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Mathematics
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jwc845
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question
8
For any $a$, can we find $b$ and $c$ such that $\phi(a^2)+\phi(b^2)=\phi(c^2)$? ($\phi$ is Euler's totient function.)
Sep 21, 2018
answer
6
A deck of $52$ cards is divided into four piles of $13$ cards. What is the probability that each pile has one ace?
Sep 18, 2018
answer
5
Where to place 10 guards in a 17-walled art gallery such that removal of any one leaves the gallery unprotected?
Sep 13, 2018
answer
4
Euler's totient function applied to higher power triples
Sep 20, 2018
answer
3
A simple convex polyhedron has $2010$ edges. Determine the number of vertices and faces.
Oct 4, 2018
answer
2
To draw a graph with only two eccentricties.
Sep 25, 2018
answer
2
In how many ways the caps can be put into the box?
Nov 24, 2019
answer
1
Find cdf given pmf
Sep 22, 2018
answer
1
To compute total possible paths in a rectangular grid if steps to the right, up, or diagonally up are allowed
Sep 23, 2018
answer
1
How to Solve Summation Notation
Sep 25, 2018