Deducing an answer on whether n is odd or even
57416
Fibonacci identity: $f_{n-1}f_{n+1} - f_{n}^2 = (-1)^n$
140359
Can the sum of finitely many inverses of distinct odd integers $\geq 3$ be 1?
85272
$3x + 1$ is even iff $5x-2$ is odd
107105
Is an irrational number odd or even?
48600
Sufficiency to prove the convergence of a sequence using even and odd terms
144447
Show that $504 \mid (n^9 − n^3 )$ for any integer $n$
77564
How to prove for each positive integer $n$, the sum of the first $n$ odd positive integers is $n^2$?
77816
Proof problem: Show that $n^2-1$ is divisible by $8$, if $n$ is an odd positive integer.
147428
Probability of picking an odd number from the set of naturals?
156242
As many even numbers as natural numbers.
20691
prove that $\frac{(2n)!}{(n!)^2}$ is even if $n$ is a positive integer
94983
Can an odd number $n$ divide $2^n-1$?
52542
For which odd positive integer $n$ , is it true that $-1$ is not a positive power of $2$ modulo $n$?
45361
Checking the consistency and Bias of $\frac{\sum X_i +\sqrt{n}/2}{n+\sqrt{n}}$
127848
Determine which Fibonacci numbers are even
40439
about a difficult and weird Probability question
156641
Show that $\gcd(3n,3n+ 2) = 1$ when $n$ is odd