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Nov
21
comment The Light beam Problem.
Consider $N=2$.
Oct
28
answered Not so obvious probability puzzle.
Oct
25
comment Game for mathematicians about differentiation of polynomials and subtractions in their coefficients.
In general, it seems that you want to be player 1 when there are an odd number of positive coefficients remaining. Let's say P1 eliminates a coefficient (differentiating can only eliminate $a_0$). If all remaining coefficients (an even number) are 1, then P1 wins. Otherwise, the next sequence of moves (under optimal play) is the game of nim where the coefficients converge to all 1's.
Sep
22
answered Probability of rolling a dice 8 times before all numbers are shown.
Dec
18
awarded  Caucus
Oct
28
answered Trace Minimization of Covariance Matrix
Apr
27
awarded  Yearling
Apr
15
awarded  Revival
Feb
6
accepted Number-Theoretic Coin Puzzle
Feb
5
revised Number-Theoretic Coin Puzzle
deleted 14 characters in body
Feb
5
comment Number-Theoretic Coin Puzzle
@MarcvanLeeuwen Done, thanks.
Feb
5
revised Number-Theoretic Coin Puzzle
deleted 14 characters in body
Feb
5
revised Number-Theoretic Coin Puzzle
edited tags
Feb
5
comment Number-Theoretic Coin Puzzle
@MarcvanLeeuwen Yes, I put that there to avoid consideration of the trivial case.
Feb
5
comment Number-Theoretic Coin Puzzle
@KonstantinosGaitanas Yes, you may move coins from any pile $x$ to any other pile $y$, but only such that the number of coins in $y$ is doubled.
Feb
5
asked Number-Theoretic Coin Puzzle
May
6
awarded  Caucus
Apr
27
awarded  Yearling
Mar
9
accepted Can the Basel problem be solved by Leibniz today?
Mar
9
comment Can the Basel problem be solved by Leibniz today?
This is a great answer! Quite $(\heartsuit)$ly.