List questions from modular-arithmetic

Published on 11 Apr 2026 - 7:59

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Question about how to prove $x^5\equiv x \pmod {10}$

Published on 26 Mar 2026 - 19:01

104

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Quadratic congruences in which modulus is divisible by constant term

Published on 11 Apr 2026 - 12:41

219

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Is $((a \mod n) + (b \mod n) ) = (a + b) \mod n$?

Published on 08 Apr 2026 - 0:21

783

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Why is a negative modulo a negative, a negative?

Published on 10 Apr 2026 - 23:59

1.8k

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How do I prove that there infinitely many rows of Pascal's triangle with only odd numbers?

Published on 11 Apr 2026 - 19:49

5k

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inverse modulo, modulo arithmetic

Published on 28 Dec 2014 - 21:31

778

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Given dividend and divisor, can we know the length of nonrepeating part and repeating part?

Published on 30 Mar 2026 - 3:56

40

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Are there positive integers $x, y$ and $z$ such that $2^{x} · 3^{4} · 14^{y} = 126^{z}$

Published on 02 Apr 2026 - 3:50

123

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provably secure hash function

Published on 01 Apr 2026 - 14:34

46

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If $10^e \equiv 1 \pmod n$ and $\gcd(10, n) \neq 1$ find the period of $\frac{1}{n}$

Published on 30 Dec 2014 - 22:38

530

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pattern in decimal representation of powers of 5

Published on 11 Apr 2026 - 8:09

70

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$a_1,a_2,\ldots,a_{11}$ and $b_1,b_2,\ldots,b_{11}$ are $2$ permutations of $1,2,\ldots,11$. Show that atleast...

Published on 31 Dec 2014 - 12:40

406

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Proof involving Euler totient function and modular arithmetic

Published on 11 Apr 2026 - 10:30

618

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Field of polynomials mod n?

Published on 31 Mar 2026 - 21:15

List Question

How to divide natural number N into M nearly equal summands?

Question about how to prove $x^5\equiv x \pmod {10}$

Quadratic congruences in which modulus is divisible by constant term

Is $((a \mod n) + (b \mod n) ) = (a + b) \mod n$?

Why is a negative modulo a negative, a negative?

How do I prove that there infinitely many rows of Pascal's triangle with only odd numbers?

inverse modulo, modulo arithmetic

Given dividend and divisor, can we know the length of nonrepeating part and repeating part?

Are there positive integers $x, y$ and $z$ such that $2^{x} · 3^{4} · 14^{y} = 126^{z}$

provably secure hash function

If $10^e \equiv 1 \pmod n$ and $\gcd(10, n) \neq 1$ find the period of $\frac{1}{n}$

pattern in decimal representation of powers of 5

$a_1,a_2,\ldots,a_{11}$ and $b_1,b_2,\ldots,b_{11}$ are $2$ permutations of $1,2,\ldots,11$. Show that atleast...

Proof involving Euler totient function and modular arithmetic

Field of polynomials mod n?

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