find a number $aabb$ such that is full square
112867
Find all digits $a,b$ such that the number $\overline{aabb}$ is a perfect square
31436
Show that for all $a\in\mathbb{N}$, there exists $b\in\mathbb{N}$ and square-free integer $c$ such that $\sqrt{a}=b\sqrt{c}$.
121036
Is there any perfect squares that are also binomial coefficients?
64140
Find a bijection from $\mathbb R$ to $\mathbb R-\mathbb N$
84220
Questions on perfect squares
116780
product is twice a square
23048
The ring $\mathbb Z[\sqrt{-2}]= \{a+b\sqrt{-2} ; a\in \mathbb Z,b\in \mathbb Z \}$ has a Euclidean algorithm
143501
Find all $n\in\mathbb N^+$ such that the sum of the digits of $5^n$ is equal to $2^n$.
71591
Formula for completing the square?
107781
Detecting perfect squares faster than by extracting square root
20548
General formula to obtain triangular-square numbers
112368
Is there a rule for $\sqrt{a+b}$?
149071
Let $d$ be any positive integer not equal to $2, 5,$ or $ 13$ , then $\exists a, b \in \{2, 5, 13, d\}$ such that $ab − 1$ is not a perfect square?
155784
If $\gcd(a, b) = 1$ and if $ab = x^2$, prove that $a, b$ must also be perfect squares; where $a,b,x$ are in the set of natural numbers
40030
FA that accepts odd number of $b$ and even number of $a$
56327
How to find the square root of a permutation
142008
Find all natural numbers $n$ such that ${(n+1)}^{1/2}-{(n-1)}^{1/2}$ is rational