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	#	Name	Tags	Difficulty	Solved by
✓	dn_s21_q001	Value of i^i 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	complex-numbers calculus	1500	x0
✓	dn_s21_q002	Compare pi^e vs e^pi 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	calculus inequalities	1400	x0
✓	dn_s21_q003	Convexity of exponential (AM-GM-like) 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	calculus convexity inequalities	1200	x0
✓	dn_s21_q004	Solve x^6 = 64 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	algebra complex-numbers	1100	x0
✓	dn_s21_q005	Derivative of x^x 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	calculus logarithmic-differentiation	1100	x0
✓	dn_s21_q006	Nested radical 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	algebra fixed-point	1100	x0
✓	dn_s21_q007	Power tower equals 2 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	algebra fixed-point	1300	x0
✓	dn_s21_q008	Convergence of three series 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	calculus series convergence	1200	x0
✓	dn_s21_q009	Integral 1/(1+x^2) 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	calculus integration	800	x0
✓	dn_s21_q010	Two integrals xln(x) and xe^x 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	calculus integration by-parts	1000	x0
✓	dn_s21_q011	Integral x^n*ln(x) 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	calculus integration by-parts	1100	x0
✓	dn_s21_q012	Integral of (ln x)^n 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	calculus integration by-parts	1400	x0
✓	dn_s21_q013	Solve linear ODE 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	ode calculus	1200	x0
✓	dn_s21_q014	Logistic equation 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	ode calculus logistic	1300	x0
✓	dn_s21_q015	Derive Black-Scholes PDE 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	black-scholes pde derivation	1900	x0
✓	dn_s22_q001	Correlation matrix positive semidefinite 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	linear-algebra correlation psd	1300	x0
✓	dn_s22_q002	Eigenvalues of given correlation matrix 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	linear-algebra correlation covariance	1100	x0
✓	dn_s22_q003	Bounds on values of p in n x n correlation matrix 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	linear-algebra correlation psd bounds	1700	x0
✓	dn_s22_q004	Eigenvalues of n x n matrix with real entries 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	linear-algebra eigenvalues	1200	x0
✓	dn_s22_q005	Find square root of 2x2 matrix 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	linear-algebra matrix-square-root	1500	x0
✓	dn_s22_q006	Reconstruct matrix from eigenvectors 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	linear-algebra eigenvectors	1400	x0
✓	dn_s22_q007	AB vs BA same size 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	linear-algebra trace	1000	x0
✓	dn_s22_q008	AB-BA equal identity 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	linear-algebra trace commutator	1500	x0
✓	dn_s22_q009	Probability matrix 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	linear-algebra stochastic-matrices	1200	x0
✓	dn_s22_q010	Find rho range for 3x3 correlation 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	linear-algebra correlation psd bounds	1600	x0
✓	dn_s23_q001	Arbitrage with three calls 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	arbitrage options convexity	1700	x0
✓	dn_s23_q002	150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	options binomial-pricing	1500	x0
✓	dn_s23_q003	ATM option price ratio worth 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	options risk-neutral binomial-pricing	1600	x0
✓	dn_s23_q004	Risk-neutral pricing concept 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	risk-neutral concepts	1300	x0
✓	dn_s23_q005	Derive Black-Scholes formula 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	black-scholes derivation concepts	1800	x0
✓	dn_s23_q006	Stock month then put option payoff 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	options put-call-parity	1700	x0
✓	dn_s23_q007	Price doubles, value of call 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	options delta greeks	1500	x0
✓	dn_s23_q008	Delta value range 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	options delta greeks	1200	x0
✓	dn_s23_q009	Delta of ATM call 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	options delta greeks	1400	x0
✓	dn_s23_q010	Put-call parity statement and proof 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	options put-call-parity	1400	x0
✓	dn_s23_q011	Time value of European call change with vol 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	options time-value	1600	x0
✓	dn_s23_q012	Implied volatility from option price 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	options implied-vol volatility-smile	1500	x0
✓	dn_s23_q013	Gamma of an option 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	options gamma greeks	1600	x0
✓	dn_s23_q014	European call put written same time 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	options put-call-parity	1700	x0
✓	dn_s23_q015	Implied vol of asset with 30 percent six month vol 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	volatility scaling	1300	x0
✓	dn_s23_q016	Value of interest rate swap 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	interest-rates swaps	1600	x0
✓	dn_s23_q017	Bond duration vs yield curve shift 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	bonds duration yield	1400	x0
✓	dn_s23_q018	Five-year bond duration sensitivity 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	bonds duration	1300	x0
✓	dn_s23_q019	Forward contract definition 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	forwards concepts	1200	x0
✓	dn_s23_q020	Forward price for treasury vs commodity 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	forwards futures commodities	1700	x0
✓	dn_s23_q021	Eurodollar futures 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	futures interest-rates	1500	x0
✓	dn_s23_q022	Forward vs futures differences 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	forwards futures	1500	x0
✓	dn_s23_q023	VaR of all-bond portfolio with 99% daily 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	risk var	1700	x0
✓	dn_s23_q024	Box spread arbitrage 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	options arbitrage box-spread	1700	x0
✓	dn_s23_q025	Implied vol exploiting straddle 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	options hedging volatility-arbitrage	1900	x0
✓	dn_s23_q026	Replication strategy puzzle 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	options replication paradox	1900	x0
✓	dn_s24_q001	How to declare an array 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	c++arrays	800	x0
✓	dn_s24_q002	Address of variable 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	c++pointers	800	x0
✓	dn_s24_q003	Declare array of pointers 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	c++pointers arrays	1000	x0
✓	dn_s24_q004	const pointer vs pointer to const 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	c++pointers const	1100	x0
✓	dn_s24_q005	Declare dynamic array 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	c++arrays memory	900	x0
✓	dn_s24_q006	Pass by reference syntax 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	c++functions	800	x0
✓	dn_s24_q007	Pass by reference 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	c++references	900	x0
✓	dn_s24_q008	Pass read-only argument 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	c++references const	900	x0
✓	dn_s24_q009	Pointer vs reference differences 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	c++pointers references	1100	x0
✓	dn_s24_q010	Default value for parameter 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	c++functions defaults	900	x0
✓	dn_s24_q011	Template function 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	c++templates	1100	x0
✓	dn_s24_q012	Pointer to function 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	c++function-pointers	1100	x0
✓	dn_s24_q013	Compiler vs explicit conversion 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	c++explicit constructors	1300	x0
✓	dn_s24_q014	Uses of static keyword 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	c++static	1300	x0
✓	dn_s24_q015	Can static member be const 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	c++static const	1400	x0
✓	dn_s24_q016	Member initialization list 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	c++constructors initializer-list	1300	x0
✓	dn_s24_q017	Copy constructor with pointer members 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	c++copy-constructor rule-of-three	1400	x0
✓	dn_s24_q018	Output of code snippet 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	c++memory double-free rule-of-three	1500	x0
✓	dn_s24_q019	Overload an operator 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	c++operator-overloading	1100	x0
✓	dn_s24_q020	Smart pointers 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	c++smart-pointers memory	1300	x0
✓	dn_s24_q021	Encapsulation 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	c++oop	900	x0
✓	dn_s24_q022	Polymorphism 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	c++oop	1000	x0
✓	dn_s24_q023	Inheritance 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	c++oop	900	x0
✓	dn_s24_q024	Virtual function and pure virtual 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	c++virtual polymorphism	1200	x0
✓	dn_s24_q025	Virtual destructors 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	c++virtual-destructor constructors	1300	x0
✓	dn_s24_q026	Factorial function 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	coding recursion	800	x0
✓	dn_s24_q027	Largest sum subarray 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	coding arrays kadane	1500	x0
✓	dn_s24_q028	Prime factors of integer 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	coding number-theory	1200	x0
✓	dn_s24_q029	Swap bits at indices i and j 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	coding bits	1400	x0
✓	dn_s24_q030	Reverse linked list 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	coding linked-list	1300	x0
✓	dn_s24_q031	Reverse string with parentheses 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	coding strings stack	1200	x0
✓	dn_s24_q032	Height of arbitrary binary tree 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	coding trees	1100	x0
✓	dn_s24_q033	N-th Fibonacci 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	coding fibonacci dp	800	x0
✓	dn_s25_q001	Standard deviation of MC estimate 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	monte-carlo pi-estimation	1300	x0
✓	dn_s25_q002	Independent standard normal generation 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	monte-carlo rng normal-sampling	1300	x0
✓	dn_s25_q003	Geometric Brownian motion stock generation 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	monte-carlo gbm	1400	x0
✓	dn_s25_q004	Generate sample from 12 independent uniforms 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	monte-carlo central-limit normal-sampling	1300	x0
✓	dn_s25_q005	Convergence rate of Monte Carlo 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	monte-carlo convergence	1200	x0
✓	dn_s25_q006	Variance reduction techniques 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	monte-carlo variance-reduction	1300	x0
✓	dn_s25_q007	Correlated normal random variables 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	monte-carlo cholesky correlation	1400	x0
✓	dn_s25_q008	Convergence of Newton's method 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	numerical-methods newton convergence	1300	x0
✓	dn_s25_q009	Finite difference and trinomial trees 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	numerical-methods finite-difference trinomial-trees	1500	x0
✓	dn_s25_q010	LU vs Cholesky 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	linear-algebra lu cholesky	1300	x0
✓	dn_s25_q011	LU decomposition without pivoting 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	linear-algebra lu pivoting	1500	x0
✓	dn_s26_q001	Exponential distribution 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	probability exponential	1000	x0
✓	dn_s26_q002	Sum of independent exponentials greater than X 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	probability exponential independence	1400	x0
✓	dn_s26_q003	Mean and variance of Poisson 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	probability poisson	900	x0
✓	dn_s26_q004	Point uniformly in unit disk 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	probability geometric	1300	x0
✓	dn_s26_q005	Conditional probability X<Y given uniforms 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	probability joint-normal conditional	1700	x0
✓	dn_s26_q006	Lognormal product 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	probability lognormal	1100	x0
✓	dn_s26_q007	Normal CDF related to Phi 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	probability normal cdf	1700	x0
✓	dn_s26_q008	Law of large numbers 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	probability concepts lln	1100	x0
✓	dn_s26_q009	Central limit theorem 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	probability concepts clt	1100	x0
✓	dn_s26_q010	Martingale and option pricing 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	probability martingale option-pricing	1500	x0
✓	dn_s26_q011	Why (dW)^2 = dt 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	stochastic-calculus ito concepts	1500	x0
✓	dn_s26_q012	Expectation of W*dW 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	stochastic-calculus wiener-process expectations	1400	x0
✓	dn_s26_q013	Variance of W*dW 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	stochastic-calculus wiener-process variance	1400	x0
✓	dn_s26_q014	Ito integrals of W and W^2 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	stochastic-calculus ito-integral	1500	x0
✓	dn_s26_q015	Distribution of integral of t dW 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	stochastic-calculus ito-integral distribution	1700	x0
✓	dn_s26_q016	Mean and variance of integral W^2 dW 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	stochastic-calculus ito-integral mean-variance	1700	x0
✓	dn_s26_q017	Variance of stochastic integral with sqrt(t) 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	stochastic-calculus ito-integral variance	1900	x0
✓	dn_s26_q018	E[e^(cW_t)] 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	stochastic-calculus wiener-process mgf	1300	x0
✓	dn_s26_q019	Variance of integral with deterministic integrand 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	stochastic-calculus ito-isometry	1400	x0
✓	dn_s26_q020	X_t = integral W^2 ds martingale? 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	stochastic-calculus martingale	1600	x0
✓	dn_s26_q021	Ito process 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	stochastic-calculus concepts	1300	x0
✓	dn_s26_q022	Ito's lemma 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	stochastic-calculus concepts ito-lemma	1400	x0
✓	dn_s26_q023	X_t = W_t^3 - 3tW_t martingale check 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	stochastic-calculus martingale ito-lemma	1700	x0
✓	dn_s26_q024	N_t = W_t^2 - 2tW_t martingale? 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	stochastic-calculus martingale ito-lemma	1700	x0
✓	dn_s26_q025	Girsanov's theorem 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	stochastic-calculus girsanov change-of-measure	1700	x0
✓	dn_s26_q026	Martingale representation theorem 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	stochastic-calculus martingale-representation	1900	x0
✓	dn_s26_q027	Solve dX = (a + bX)dt + sdW 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	stochastic-calculus sde	1500	x0
✓	dn_s26_q028	Solve two SDEs 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	stochastic-calculus sde gbm	1800	x0
✓	dn_s26_q029	Heston model 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	stochastic-calculus stochastic-vol heston	2000	x0
✓	dn_s26_q030	Density of standard normal integrand 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	probability normal gaussian-integral	1500	x0
✓	dn_s26_q031	2D BM hitting line and inner/outer circle 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	stochastic-calculus 2d-brownian hitting-times	2200	x0
✓	dn_s26_q032	Density under change of measure 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	stochastic-calculus girsanov change-of-measure	2100	x0
✓	dn_s27_q001	Ants on triangle collision 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser combinatorics fibonacci	1700	x0
✓	dn_s27_q002	Box of pancakes probability uphill 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser probability conditional	1300	x0
✓	dn_s27_q003	Heads vs tails - Alice/Bob coin flips 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser probability symmetry	1700	x0
✓	dn_s27_q004	Restaurant coin flip biased 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser probability fair-from-biased	1400	x0
✓	dn_s27_q005	Coin toss expected tosses to get heads 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser probability expected-value	1000	x0
✓	dn_s27_q006	Coin tosses expected sequence head tail 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser probability expected-value states	1500	x0
✓	dn_s27_q007	Biased coin biased with 25% prob heads 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser probability expected-value	1100	x0
✓	dn_s27_q008	Fibonacci-like fair coin tossing 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser probability fibonacci	1900	x0
✓	dn_s27_q009	Highest floor egg drop with two eggs 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser search egg-drop	1700	x0
✓	dn_s27_q010	Ant in corner of cube 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser geometry shortest-path	1400	x0
✓	dn_s27_q011	Cube cut into 1000 cubes 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser geometry combinatorics	1300	x0
✓	dn_s27_q012	Fox Mulder large circular field 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser pursuit geometry	2100	x0
✓	dn_s27_q013	Two subway stations frequency 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser scheduling	1500	x0
✓	dn_s27_q014	Cut off with no minute, hour clocks 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser branching-process	1700	x0
✓	dn_s27_q015	Pick two distinct elements from set 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser combinatorics probability	1500	x0
✓	dn_s27_q016	Alice writes two distinct numbers 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser probability strategy	1800	x0
✓	dn_s27_q017	Number of digits 2^125 in base 10 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser log numeric	1700	x0
✓	dn_s27_q018	Arrange numbers 1..2015 cycle equal sums 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser combinatorics alternating-sum	1900	x0
✓	dn_s27_q019	Mr and Mrs Jones inviting four couples 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser graph logic	1800	x0
✓	dn_s27_q020	NYC and SF bridge tolls 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser betting binomial	1900	x0
✓	dn_s27_q021	Heavy yellow balls 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser weighing	1700	x0
✓	dn_s27_q022	10 coins find treasure with magic coins 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser search comparisons	1500	x0
✓	dn_s27_q023	Distinct numbers from cubes 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser algorithm min-max	1600	x0
✓	dn_s27_q024	Cube jump vertex Markov-chain 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser markov-chain expected-value	1700	x0
✓	dn_s27_q025	Number summary statistics from sample without writing them 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser expected-value stopping-time	1800	x0
✓	dn_s27_q026	150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser renewal-process exponential	1700	x0
✓	dn_s27_q027	Random walk 1D until n 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser random-walk gamblers-ruin	1500	x0
✓	dn_s27_q028	Stick break into two pieces 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser geometric-probability uniform	1300	x0
✓	dn_s27_q029	Stick break into three pieces (triangle?) 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser geometric-probability triangle	1700	x0
✓	dn_s27_q030	Manhole cover round 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser geometry classic	1100	x0
✓	dn_s27_q031	Clock hands first match 12 o'clock 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser geometry clocks	1300	x0
✓	dn_s27_q032	Three light switches in room 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser logic	1500	x0
✓	dn_s27_q033	2009 nine digit number missing digit 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser number-theory digital-root	1700	x0
✓	dn_s27_q034	Alice and Bob stand at opposite ends 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser ants classic	1600	x0
✓	dn_s27_q035	30 people in party 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser permutations cycles	1500	x0
✓	dn_s27_q036	Sum of digits of 2019 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser number-theory digital-root	1100	x0
✓	dn_s27_q037	Find 2019 consecutive positive integers that are not prime 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser number-theory factorial	1600	x0
✓	dn_s27_q038	100 coins 4 fake balance 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser weighing coins	1700	x0
✓	dn_s27_q039	Pair of 6-sided fair dice rolls 150 Most Frequently Asked Questions on Quant Interviews (Stefanica, Radoicic, Wang) · Ch 2 · Questions	brainteaser dice sicherman	1900	x0

1	inderjeet230502	1218
2	kalash.kankaria	1205