Question

What is the minimum number of colours needed for coding 12 objects, if each may be marked with either one or two colours?

score 246 · Answer 1 · 2014-07-31 07:38:15

246

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What is the minimum number of colours needed for coding 12 objects, if each may be marked with either one or two colours?

Published on 31 Jul 2014 - 7:38

score 1.2k · Answer 2 · 2026-04-12 08:43:30

1.2k

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Intuitive explanation of even/odd permutation

Published on 12 Apr 2026 - 8:43

score 62 · Answer 3 · 2014-08-02 15:16:21

62

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How to check if $\text{position}\left(\frac{a + b} 2\right )$ is in range $\text{position}\left(a\right )$ and $\text{position}\left(b\right )$

Published on 02 Aug 2014 - 15:16

score 576 · Answer 4 · 2026-04-11 20:38:49

576

Views

Calculating sign of a permutation

Published on 11 Apr 2026 - 20:38

score 160 · Answer 5 · 2014-08-02 18:25:08

160

Views

Number of ways by which we can form a n digit number such that no two digit are same in the number?

Published on 02 Aug 2014 - 18:25

score 300 · Answer 6 · 2026-03-26 23:11:23

300

Views

Number of ways possible to form a number?

Published on 26 Mar 2026 - 23:11

score 688 · Answer 7 · 2014-08-02 21:39:22

688

Views

Show if $\pi,\sigma$ are any permutation s.t $(\pi\sigma)^2=\pi^2\sigma^2$, then $\pi\sigma=\sigma\pi$...

Published on 02 Aug 2014 - 21:39

score 2.9k · Answer 8 · 2014-08-03 04:53:18

2.9k

Views

A 4 digits number is formed using 2,3,5,7 and 9 without repeat

Published on 03 Aug 2014 - 4:53

score 48 · Answer 9 · 2014-08-03 07:15:48

48

Views

The permutation $\lambda_g \quad : \quad G \longmapsto G \quad : \quad x \mapsto gx$

Published on 03 Aug 2014 - 7:15

score 827 · Answer 10 · 2026-04-06 19:02:00

827

Views

Show that there is just one subgroup $H \subset S_4$ such that $[S_4:H] = 2$

Published on 06 Apr 2026 - 19:02

score 381 · Answer 11 · 2026-04-06 19:02:00

381

Views

$A_n \times \mathbb{Z} /2 \mathbb{Z} \ \ncong \ S_n$ for $n \geq 3$

Published on 06 Apr 2026 - 19:02

score 353 · Answer 12 · 2026-04-10 21:38:10

353

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Regarding the composition of permutations...

Published on 10 Apr 2026 - 21:38

score 5.2k · Answer 13 · 2026-04-12 06:26:40

5.2k

Views

Counting how many numbers have repeated digits

Published on 12 Apr 2026 - 6:26

score 5.3k · Answer 14 · 2014-08-06 03:09:55

5.3k

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How many $3$ letter "words" consisting of at least $1$ vowel and $1$ consonant can be made from the letters of EQUATION?

Published on 06 Aug 2014 - 3:09

score 1.1k · Answer 15 · 2014-08-06 20:37:57

1.1k

Views

A question on the automorphism of simple graph with distinct eigenvalues of adjacency matrix

Published on 06 Aug 2014 - 20:37

List Question

What is the minimum number of colours needed for coding 12 objects, if each may be marked with either one or two colours?

Intuitive explanation of even/odd permutation

How to check if $\text{position}\left(\frac{a + b} 2\right )$ is in range $\text{position}\left(a\right )$ and $\text{position}\left(b\right )$

Calculating sign of a permutation

Number of ways by which we can form a n digit number such that no two digit are same in the number?

Number of ways possible to form a number?

Show if $\pi,\sigma$ are any permutation s.t $(\pi\sigma)^2=\pi^2\sigma^2$, then $\pi\sigma=\sigma\pi$...

A 4 digits number is formed using 2,3,5,7 and 9 without repeat

The permutation $\lambda_g \quad : \quad G \longmapsto G \quad : \quad x \mapsto gx$

Show that there is just one subgroup $H \subset S_4$ such that $[S_4:H] = 2$

$A_n \times \mathbb{Z} /2 \mathbb{Z} \ \ncong \ S_n$ for $n \geq 3$

Regarding the composition of permutations...

Counting how many numbers have repeated digits

How many $3$ letter "words" consisting of at least $1$ vowel and $1$ consonant can be made from the letters of EQUATION?

A question on the automorphism of simple graph with distinct eigenvalues of adjacency matrix

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