Question

A 5 digit number is formed using the digits 0,1,2,3,4 and 5, probability it is divisible by 6?

score 14.4k · Answer 1 · 2017-06-07 04:26:59

14.4k

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A 5 digit number is formed using the digits 0,1,2,3,4 and 5, probability it is divisible by 6?

Published on 07 Jun 2017 - 4:26

score 2.2k · Answer 2 · 2017-06-11 18:56:31

2.2k

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$\frac {5}{7} = \frac {a_{2}}{2!} + \frac {a_{3}}{3!} + \frac {a_{4}}{4!} + \frac {a_{5}}{5!} + \frac {a_{6}}{6!} + \frac {a_{7}}{7!}$

Published on 11 Jun 2017 - 18:56

score 5.2k · Answer 3 · 2017-06-12 03:10:51

5.2k

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Repeatedly taking differences on a polynomial yields the factorial of its degree?

Published on 12 Jun 2017 - 3:10

score 272 · Answer 4 · 2026-04-04 06:09:16

272

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Find a combinatorial proof to 10!=7!6!

Published on 04 Apr 2026 - 6:09

score 105 · Answer 5 · 2017-06-16 13:13:19

105

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Factorial Triples

Published on 16 Jun 2017 - 13:13

score 89 · Answer 6 · 2017-06-18 04:53:02

89

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Computing $\frac{(16!)!}{16!}$

Published on 18 Jun 2017 - 4:53

score 129 · Answer 7 · 2026-03-29 13:20:25

129

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Does this function have a closed form?

Published on 29 Mar 2026 - 13:20

score 894 · Answer 8 · 2017-06-19 17:57:01

894

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2015! to base 6... How many zeros does it have?

Published on 19 Jun 2017 - 17:57

score 90 · Answer 9 · 2017-06-20 18:11:37

90

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Appreciate help on a problem with the sum of squared combinations picked from a factorial.

Published on 20 Jun 2017 - 18:11

score 473 · Answer 10 · 2017-06-21 20:08:03

473

Views

Proof by induction, factorials and exponents

Published on 21 Jun 2017 - 20:08

score 112 · Answer 11 · 2017-06-23 04:15:22

112

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Can somebody help me prove that $x^{\underline{k+1}}+kx^{\underline{k}} = xx^{\underline{k}}$?

Published on 23 Jun 2017 - 4:15

score 2k · Answer 12 · 2026-04-03 08:03:08

2k

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What number do you remove from $1!2!\cdots 99!100!$ to get a perfect square?

Published on 03 Apr 2026 - 8:03

score 51 · Answer 13 · 2017-06-26 07:28:01

51

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I don't understand one thing in a solution of a number theory task

Published on 26 Jun 2017 - 7:28

score 252 · Answer 14 · 2017-06-27 16:44:58

252

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summation of reciprocal of factorial and square root

Published on 27 Jun 2017 - 16:44

score 86 · Answer 15 · 2026-04-03 06:51:04

86

Views

Minimize $a$, but ensure convergence

Published on 03 Apr 2026 - 6:51

List Question

A 5 digit number is formed using the digits 0,1,2,3,4 and 5, probability it is divisible by 6?

$\frac {5}{7} = \frac {a_{2}}{2!} + \frac {a_{3}}{3!} + \frac {a_{4}}{4!} + \frac {a_{5}}{5!} + \frac {a_{6}}{6!} + \frac {a_{7}}{7!}$

Repeatedly taking differences on a polynomial yields the factorial of its degree?

Find a combinatorial proof to 10!=7!6!

Factorial Triples

Computing $\frac{(16!)!}{16!}$

Does this function have a closed form?

2015! to base 6... How many zeros does it have?

Appreciate help on a problem with the sum of squared combinations picked from a factorial.

Proof by induction, factorials and exponents

Can somebody help me prove that $x^{\underline{k+1}}+kx^{\underline{k}} = xx^{\underline{k}}$?

What number do you remove from $1!2!\cdots 99!100!$ to get a perfect square?

I don't understand one thing in a solution of a number theory task

summation of reciprocal of factorial and square root

Minimize $a$, but ensure convergence

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