Question

What is the number of $6$-digit numbers that have got all odd digits and for which every $9$ is followed by a $1$?

score 70 · Answer 1 · 2018-03-15 16:09:41

What is the number of $6$-digit numbers that have got all odd digits and for which every $9$ is followed by a $1$?

score 96 · Answer 2 · 2026-03-27 21:59:20

96

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How many ways can six people be seated at a round table with restrictions?

Published on 27 Mar 2026 - 21:59

score 298 · Answer 3 · 2018-03-15 16:38:05

298

Views

A hard constructive counting problem

Published on 15 Mar 2018 - 16:38

score 1.4k · Answer 4 · 2026-03-27 21:57:44

1.4k

Views

In how many ways can the letters of the word PESSIMISTIC be arranged subject to restrictions?

Published on 27 Mar 2026 - 21:57

score 155 · Answer 5 · 2026-04-04 02:52:35

155

Views

How can I evenly distribute skill among teams.

Published on 04 Apr 2026 - 2:52

score 118 · Answer 6 · 2026-04-03 03:40:20

118

Views

Seating $m$ people in $m^2$ chairs at a round table

Published on 03 Apr 2026 - 3:40

score 93 · Answer 7 · 2018-03-15 20:16:19

93

Views

The largest integer dividing these $(n+19)(n+18)(n+17)(n+16)$

Published on 15 Mar 2018 - 20:16

score 1k · Answer 8 · 2026-03-27 22:00:39

1k

Views

Number of ways a 4 digit number can be formed using the given digits which are divisible by 2 and 5

Published on 27 Mar 2026 - 22:00

score 60 · Answer 9 · 2018-03-15 20:30:50

60

Views

Counting: passwords

Published on 15 Mar 2018 - 20:30

score 76 · Answer 10 · 2026-03-26 06:17:45

76

Views

Inverse bin ball problem

Published on 26 Mar 2026 - 6:17

score 6.8k · Answer 11 · 2026-03-25 00:13:40

6.8k

Views

How can a bipartite graph be Eulerian?

Published on 25 Mar 2026 - 0:13

score 43 · Answer 12 · 2018-03-16 01:03:18

43

Views

integer points in a face of $n-$ dimensional Box

Published on 16 Mar 2018 - 1:03

score 40 · Answer 13 · 2018-03-16 05:19:59

40

Views

How Many Cases We Have for Multiset Combinatorics Confined in Total Number

Published on 16 Mar 2018 - 5:19

score 34 · Answer 14 · 2018-03-16 06:06:19

34

Views

How to count special sets?

Published on 16 Mar 2018 - 6:06

score 232 · Answer 15 · 2018-03-16 10:04:54

232

Views

Expected number of times an object is picked from a randomly ordered list of distinct objects

Published on 16 Mar 2018 - 10:04

List Question

What is the number of $6$-digit numbers that have got all odd digits and for which every $9$ is followed by a $1$?

How many ways can six people be seated at a round table with restrictions?

A hard constructive counting problem

In how many ways can the letters of the word PESSIMISTIC be arranged subject to restrictions?

How can I evenly distribute skill among teams.

Seating $m$ people in $m^2$ chairs at a round table

The largest integer dividing these $(n+19)(n+18)(n+17)(n+16)$

Number of ways a 4 digit number can be formed using the given digits which are divisible by 2 and 5

Counting: passwords

Inverse bin ball problem

How can a bipartite graph be Eulerian?

integer points in a face of $n-$ dimensional Box

How Many Cases We Have for Multiset Combinatorics Confined in Total Number

How to count special sets?

Expected number of times an object is picked from a randomly ordered list of distinct objects

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