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Expiring coupon collector's problem

probability combinatorics coupon-collector asked Aug 30, 2012 at 17:07

math.stackexchange.com

23 votes

Analyzing a class of vertex-deletion games

graph-theory combinatorial-game-theory asked Jan 2, 2012 at 20:39

math.stackexchange.com

13 votes

Comparing powers without logarithms

arithmetic project-euler asked Jan 6, 2012 at 21:52

math.stackexchange.com

13 votes

Reversing a list using two queues

ds.algorithms ds.data-structures lower-bounds time-complexity sorting asked Jan 14, 2011 at 21:20

cstheory.stackexchange.com

9 votes

Group-Interview Secretary Problem

stochastic-processes puzzle asked Mar 21, 2011 at 0:28

math.stackexchange.com

8 votes

"Go-first" dice for $N$ players

combinatorics probability-distributions dice asked Jun 27, 2012 at 18:54

math.stackexchange.com

7 votes

Removing a card while preserving "shuffled-ness"

probability card-games asked Feb 13, 2013 at 23:42

math.stackexchange.com

7 votes

Trouble simplifying a tough equation

recreational-mathematics asked Dec 31, 2012 at 23:36

math.stackexchange.com

5 votes

Behavior of explosive random process

stochastic-processes markov-chains asked Oct 5, 2012 at 19:22

math.stackexchange.com

5 votes

On randomly permuting digits in a large random number

recreational-mathematics greatest-common-divisor natural-numbers asked Dec 15, 2018 at 5:40

math.stackexchange.com

Top Answers

'Obvious' theorems that are actually false

math.stackexchange.com

Gödel's ontological proof

math.stackexchange.com

What is the millionth decimal digit of the $ 10^{10^{10^{10}}} $-th prime?

math.stackexchange.com

Mathematician vs. Computer: A Game

math.stackexchange.com

Probability of winning a game by rolling the die first

math.stackexchange.com

A 20+ year old combinatorial problem - the cookie game

math.stackexchange.com

Is half a pie as big as a whole pie?

math.stackexchange.com

Iterated exponent of $i$

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Finding Value of the Infinite Product $\prod \Bigl(1-\frac{1}{n^{2}}\Bigr)$

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Inverse of the sum of matrices

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Number of zero digits in factorials

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Guessing a subset of $\{1,...,N\}$

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Intuition about infinite sums

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Conjectured closed form for $\int_0^1x^{2\,q-1}\,K(x)^2dx$ where $K(x)$ is the complete elliptic integral of the 1ˢᵗ kind

math.stackexchange.com

incremental computation of standard deviation

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Are the integers closed under addition... really?

math.stackexchange.com

Searching for rock-hard integers.

math.stackexchange.com

Is the "Fewest Discriminating Bits" problem NP-complete?

cstheory.stackexchange.com

1D random walk-probability to go back to origin

math.stackexchange.com

Random Walk Without Repetitions

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How many lists of 100 numbers (1 to 10 only) add to 700?

math.stackexchange.com

Is the solution to this holiday puzzle unique?

math.stackexchange.com

Expected value in coin flipping process

math.stackexchange.com

Number of roots of $x^a-1=0$ with $a \in \mathbb{C}$

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Bijection between an open and a closed interval

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Is there a bijection between $(0,1)$ and $\mathbb{R}$ that preserves rationality?

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An 8th grade contest-math puzzle

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Solving a Nonlinear Recursion

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Are we guaranteed that the harmonic series minus infinite random terms always converge?

math.stackexchange.com

Using the rules that prove the sum of all natural numbers is $-\frac{1}{12}$, how can you prove that the harmonic series diverges?

math.stackexchange.com