What is special about square numbers here?
68024
The final state of 1000 light bulbs switched on/off by 1000 people passing by
123539
Numerical phenomenon. Who can explain?
103464
What is special about the numbers 9801, 998001, 99980001 ..?
44790
Find $n$ for which $\frac{n(n+1)}{2}$ is perfect square
18932
Squares in arithmetic progression
56328
Find p is the prime number which $\frac{p+1}{2}$ and $\frac{p^2+1}{2}$ both are square number.
92912
Why is the number $e$ so important in mathematics?
135212
The square of an integer has form $3n$ or $3n+1$
116780
product is twice a square
8034
Can $n!$ be a perfect square when $n$ is an integer greater than $1$?
54030
Square and square root and negative numbers
125702
There is a square $Q$ consisting of $(0,0), (2,0), (0,2), (2,2)$
140433
The number of ways of writing an integer as a sum of two squares
53513
Why is it that in $\mathbb{F}_q \setminus 0$, there are exactly as many squares as non-squares?
41641
$(n-7)(n+7)=$ some perfect square
100045
What is so special about elliptic curves?
90076
Prove that every positive integer $n$ is a unique product of a square and a squarefree number