square of an odd number is not in the form of 4k+1 or 8k+1?
72511
If $n$ is an odd natural number, then $8$ divides $n^{2}-1$
130723
Why is the result of a raster calculation integer when it should be decimal?
24997
Convert arithmetic rgb value to 8bit RGB value
31907
Why does N[1.000 01, 10] return 1.00001, but N[1.000 001, 10] returns only 1.?
63895
What is the next perfect square of the form 14444... in decimal notation?
69833
Number of elements not equal to their inverses is even number
120498
Why perfect square has odd number of factors
45672
Even/Odd Binomial Coefficients
157069
sum of double precision gives weird results
11506
Alternative proof that $(a^2+b^2)/(ab+1)$ is a square when it's an integer
10692
Why is 24.0000 not equal to 24.0000 in MATLAB?
132821
Why are floating point numbers printed so differently?
1522
Is $\sqrt{64}$ considered $8$? or is it $8,-8$?
9092
What is special about square numbers here?
21903
What is the difference between [0-9]+ and [0-9]++?
60965
Representing a nonnegative integer as the ordered sum of odd numbers
50596
$p_1p_2...p_n +1$ is not square for $p_k = k$'th prime