List questions from divisibility

Published on 13 Apr 2026 - 15:35

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For which $n ≥ 0$ is $2^n + 2 · 3^n$ divisible by $8$?

Published on 31 Oct 2015 - 13:24

302

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Can integers be divisible by real numbers?

Published on 01 Nov 2015 - 6:42

288

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Can I mix direct proof with inductive proof?

Published on 13 Apr 2026 - 5:13

155

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Prove that 1 less than the number of equivalence classes divides $p-1$ where $p$ is prime

Published on 04 Apr 2026 - 13:43

66

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Divisibility criterion for 11

Published on 03 Nov 2015 - 14:46

137

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Greatest common divisor of linear combination of two comprime numbers

Published on 12 Apr 2026 - 14:41

38

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Simple Division Problem

Published on 09 Apr 2026 - 14:33

292

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For $n \in \mathbb{N}$, show that $4^n + 10 \times 9^{2n-2}$ is divisible by 7

Published on 12 Apr 2026 - 12:50

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Is there a mathematical definition for the "divisibility" of rational numbers?

Published on 10 Apr 2026 - 12:24

587

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Greatest Common Divisor Proof: $\gcd(m^2-n^2, m^2+n^2) = 1$

Published on 03 Apr 2026 - 14:26

278

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If dividing $n$ by $m$ yields remainder $r$, then dividing $-n$ by $m$ yields remainder $-r$

Published on 05 Nov 2015 - 0:16

114

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4 Divides x Proofs of conjectures

Published on 29 Mar 2026 - 15:34

138

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Divisibility sequence resulting in limit with pi

Published on 30 Mar 2026 - 4:00

1.7k

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Inductive proof that $n(n-1)(n+1)$ is divisible by $6$

Published on 11 Apr 2026 - 15:23

List Question

4 variables how many combos of 3 can you make

For which $n ≥ 0$ is $2^n + 2 · 3^n$ divisible by $8$?

Can integers be divisible by real numbers?

Can I mix direct proof with inductive proof?

Prove that 1 less than the number of equivalence classes divides $p-1$ where $p$ is prime

Divisibility criterion for 11

Greatest common divisor of linear combination of two comprime numbers

Simple Division Problem

For $n \in \mathbb{N}$, show that $4^n + 10 \times 9^{2n-2}$ is divisible by 7

Is there a mathematical definition for the "divisibility" of rational numbers?

Greatest Common Divisor Proof: $\gcd(m^2-n^2, m^2+n^2) = 1$

If dividing $n$ by $m$ yields remainder $r$, then dividing $-n$ by $m$ yields remainder $-r$

4 Divides x Proofs of conjectures

Divisibility sequence resulting in limit with pi

Inductive proof that $n(n-1)(n+1)$ is divisible by $6$

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