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New posts in square-numbers
Can any number of squares sum to a square?
elementary-number-theory
square-numbers
tiling
polyomino
Can $n!$ be a perfect square when $n$ is an integer greater than $1$?
number-theory
elementary-number-theory
diophantine-equations
factorial
square-numbers
Prove that none of $\{11, 111, 1111,\dots \}$ is the perfect square of an integer
elementary-number-theory
decimal-expansion
square-numbers
repunit-numbers
Let $k$ be a natural number . Then $3k+1$ , $4k+1$ and $6k+1$ cannot all be square numbers.
number-theory
contest-math
diophantine-equations
elliptic-curves
square-numbers
$n!+1$ being a perfect square
number-theory
elementary-number-theory
diophantine-equations
factorial
square-numbers
Numbers $n$ such that the digit sum of $n^2$ is a square
number-theory
decimal-expansion
square-numbers
What is the algebraic intuition behind Vieta jumping in IMO1988 Problem 6?
elementary-number-theory
induction
contest-math
square-numbers
infinite-descent
Find all functions $f$ such that if $a+b$ is a square, then $f(a)+f(b)$ is a square
number-theory
contest-math
functional-equations
square-numbers
Alternative proof that $(a^2+b^2)/(ab+1)$ is a square when it's an integer
elementary-number-theory
square-numbers
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