mjqxxxx

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242 Answers

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27
What is the millionth decimal digit of the (10^10^10^10)th prime?
24
A 20+ year old combinatorial problem - the cookie game
24
Iterated exponent of $i$
18
Finding Value of the Infinite Product $\prod \Bigl(1-\frac{1}{n^{2}}\Bigr)$
14
Is the solution to this holiday puzzle unique?
13
A question about series with a strange property.
13
Guessing a subset of $\{1,…,N\}$
12
Number of roots of $x^a-1=0$ with $a \in \mathbb{C}$
12
Name of this identity? $\int e^{\alpha x}\cos(\beta x) \space dx = \frac{e^{\alpha x} (\alpha \cos(\beta x)+\beta \sin(\beta x))}{\alpha^2+\beta^2}$
11
What is the closed form sum of this series?
10
Find $x$ from $3^x\cdot x^3 = 1$
10
$\pi$ polynomials whose real zeros approximate $\pi$
10
Fibonacci[n]-1 is always composite for n>6. why?
9
Two random variables and their sum
9
Algorithm for a deck manipulation
9
Sum of powers-of-integers bound
9
Tetrahedral torus
8
Evaluating $\sqrt{1 + \sqrt{2 + \sqrt{4 + \sqrt{8 + \ldots}}}}$
8
proving algorithm to check if two strings are anagrams-
8
Gödel's ontological proof - How does it work?
8
recurrence relation arising from Magic the Gathering scenario
8
What type of number is x?
8
1D random walk-probability to go back to origin
7
Can an event be possible if its probability is zero?
7
Limit of a Sequence in $\mathbb R$
7
Simple proof that $8\left(\frac{9}{10}\right)^8 > 1$
7
Entropy of generatable(?) structures
7
Guessing a hidden number on a cube
6
Number of zero digits in factorials
6
What's the right way to make a change of variables under another integral?
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