List questions from gcd-and-lcm

Published on 04 Mar 2022 - 19:56

60

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Proof of Pythagorean quadruple

Published on 08 Apr 2026 - 5:11

1.1k

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how to find the number of integers between two numbers inclusive that are divisible by any of the two numbers X or Y.

Published on 05 Apr 2026 - 21:50

236

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When is the $\gcd$ not prime?

Published on 23 Mar 2022 - 16:09

90

Views

Calculate $\gcd(a^2b^2, a^2 + ab + b^2)$

Published on 28 Mar 2022 - 8:27

34

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Maximum number of colours we can use to colour all the integers so that for any integers i,j, i and j have the same colour if |i-j|=38 or |i-j|=27?

Published on 28 Mar 2022 - 14:38

74

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How to prove that the number 6+2 can be represented as the sum of two coprime numbers?

Published on 24 Feb 2026 - 2:19

211

Views

In a group, when does $|ab| = \mathrm{lcm}(|a|, |b|)$

Published on 04 Apr 2022 - 22:34

485

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Denominators of fractions are closed under gcd (vector gcds)

Published on 30 Mar 2026 - 6:11

55

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Demonstrating Equivalent GCDs

Published on 08 Apr 2022 - 6:55

29

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Fitting a noisy and incomplete arithmetic progression

Published on 26 Mar 2026 - 3:00

28

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Greatest common divisor: Euclidian Algorithm, missing proof step

Published on 29 Mar 2026 - 20:45

728

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Space obtained by attaching two $2$-cells to $S^1$

Published on 29 Mar 2026 - 9:10

28

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Euclidian Algorithm: proof that $n_i < \frac{n_{i-2}}{2}\quad \forall i\geq 2$

Published on 29 Mar 2026 - 20:45

46

Views

Uniqueness of GCD when considering all integers.

Published on 21 Apr 2022 - 19:01

List Question

Is there a name for $\text{LCM}(a, n)/a$?

Proof of Pythagorean quadruple

how to find the number of integers between two numbers inclusive that are divisible by any of the two numbers X or Y.

When is the $\gcd$ not prime?

Calculate $\gcd(a^2b^2, a^2 + ab + b^2)$

Maximum number of colours we can use to colour all the integers so that for any integers i,j, i and j have the same colour if |i-j|=38 or |i-j|=27?

How to prove that the number 6+2 can be represented as the sum of two coprime numbers?

In a group, when does $|ab| = \mathrm{lcm}(|a|, |b|)$

Denominators of fractions are closed under gcd (vector gcds)

Demonstrating Equivalent GCDs

Fitting a noisy and incomplete arithmetic progression

Greatest common divisor: Euclidian Algorithm, missing proof step

Space obtained by attaching two $2$-cells to $S^1$

Euclidian Algorithm: proof that $n_i < \frac{n_{i-2}}{2}\quad \forall i\geq 2$

Uniqueness of GCD when considering all integers.

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