Question

Do powers of 256 all end by 6 and if so, how to prove it?

score 1.3k · Answer 1 · 2026-03-26 16:06:29

1.3k

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Do powers of 256 all end by 6 and if so, how to prove it?

Published on 26 Mar 2026 - 16:06

score 50 · Answer 2 · 2026-03-26 02:55:00

50

Views

Confirming Axioms of Vector Spaces that rely on modular arithmetic

Published on 26 Mar 2026 - 2:55

score 55 · Answer 3 · 2019-02-10 20:38:58

55

Views

Primes that give different residue modulo $6$

Published on 10 Feb 2019 - 20:38

score 581 · Answer 4 · 2026-03-25 10:52:30

581

Views

Visualizing quadratic residues and their structure

Published on 25 Mar 2026 - 10:52

score 115 · Answer 5 · 2026-03-26 16:26:29

115

Views

Find x such that $495x \equiv 90 \pmod{6}$ or explain why it does not exist

Published on 26 Mar 2026 - 16:26

score 135 · Answer 6 · 2019-02-12 09:07:50

135

Views

Replacing coefficient of congruence

Published on 12 Feb 2019 - 9:07

score 947 · Answer 7 · 2026-03-26 12:07:43

947

Views

can we perform modulo operator on a fraction on both of it's numerator and denominator?

Published on 26 Mar 2026 - 12:07

score 302 · Answer 8 · 2019-02-13 19:35:38

302

Views

Finding the remainder of $823^{823}$ in the division by 11

Published on 13 Feb 2019 - 19:35

score 1.6k · Answer 9 · 2026-03-25 15:43:40

1.6k

Views

Simultaneous congruences $3x \equiv 2 \pmod{5}$, $3x \equiv 4 \pmod{7}$, $3x \equiv 6 \pmod{11}$

Published on 25 Mar 2026 - 15:43

score 120 · Answer 10 · 2019-02-13 20:43:32

120

Views

Prove the sum from $1$ to $n$ is congruent to half $n$ or $0$ for even or odd values of $n$

Published on 13 Feb 2019 - 20:43

score 134 · Answer 11 · 2026-03-26 12:05:48

134

Views

$N! \pmod{P}$ (huge numbers)

Published on 26 Mar 2026 - 12:05

score 36 · Answer 12 · 2019-02-14 21:10:29

36

Views

Prove if $a \equiv x\pmod m$ and $b \equiv x \pmod m$ for $x \in \{0,1,...,m-1\}$, then $a \equiv b$

Published on 14 Feb 2019 - 21:10

score 3.1k · Answer 13 · 2019-02-14 23:09:59

3.1k

Views

Are prime numbers really random?

Published on 14 Feb 2019 - 23:09

score 1.1k · Answer 14 · 2026-03-28 16:44:15

1.1k

Views

In a geometric sequence, the sum of the first six terms is 9 times the sum of the first three terms. If the first term is f5, what is the third term?

Published on 28 Mar 2026 - 16:44

score 74 · Answer 15 · 2026-03-26 12:07:00

74

Views

Finding the last non-zero digit of $n!$ in $O(1)$

Published on 26 Mar 2026 - 12:07

List Question

Do powers of 256 all end by 6 and if so, how to prove it?

Confirming Axioms of Vector Spaces that rely on modular arithmetic

Primes that give different residue modulo $6$

Visualizing quadratic residues and their structure

Find x such that $495x \equiv 90 \pmod{6}$ or explain why it does not exist

Replacing coefficient of congruence

can we perform modulo operator on a fraction on both of it's numerator and denominator?

Finding the remainder of $823^{823}$ in the division by 11

Simultaneous congruences $3x \equiv 2 \pmod{5}$, $3x \equiv 4 \pmod{7}$, $3x \equiv 6 \pmod{11}$

Prove the sum from $1$ to $n$ is congruent to half $n$ or $0$ for even or odd values of $n$

$N! \pmod{P}$ (huge numbers)

Prove if $a \equiv x\pmod m$ and $b \equiv x \pmod m$ for $x \in \{0,1,...,m-1\}$, then $a \equiv b$

Are prime numbers really random?

In a geometric sequence, the sum of the first six terms is 9 times the sum of the first three terms. If the first term is f5, what is the third term?

Finding the last non-zero digit of $n!$ in $O(1)$

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