Problemset

39 / 689 problems

Filters

Book

Chapter

Answer type

Difficulty: 800 – 2200

Tags

	#	Name	Tags	Difficulty	Solved by
✓	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