Question

How to find the sum of the following series from $n=0$ to $n=99$

score 171 · Answer 1 · 2026-03-26 11:01:25

171

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How to find the sum of the following series from $n=0$ to $n=99$

Published on 26 Mar 2026 - 11:01

score 63 · Answer 2 · 2026-03-25 02:48:35

63

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K-subsets, counting, and the pigeon hole principle

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score 2k · Answer 3 · 2026-03-25 06:21:07

2k

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score 425 · Answer 4 · 2018-02-25 10:49:50

425

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Is $577^3$ the smallest cube that is expressible as the sum of $3$ positive cubes in $6$ different ways?

Published on 25 Feb 2018 - 10:49

score 56 · Answer 5 · 2018-02-25 15:44:46

56

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Total number of questions

Published on 25 Feb 2018 - 15:44

score 2.3k · Answer 6 · 2026-03-25 20:17:10

2.3k

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Creating 6 Digit Numbers Whose Adjacent Digits are Relatively Prime

Published on 25 Mar 2026 - 20:17

score 35 · Answer 7 · 2026-03-25 06:18:52

35

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Published on 25 Mar 2026 - 6:18

score 26 · Answer 8 · 2026-02-25 07:54:06

26

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Published on 25 Feb 2026 - 7:54

score 72 · Answer 9 · 2026-03-25 19:11:15

72

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score 524 · Answer 10 · 2026-03-26 12:02:29

524

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How can I prove that $\frac{1}{\sqrt{1-4x}}=\sum_{n=0}^{\infty} \binom {2n} {n} x^n$

Published on 26 Mar 2026 - 12:02

score 235 · Answer 11 · 2026-03-25 06:11:23

235

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Prove that the set $[0,1]\setminus E$ has Lebesgue measure zero.

Published on 25 Mar 2026 - 6:11

score 842 · Answer 12 · 2026-03-25 11:09:31

842

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Binomial Coefficient deck of cards probability question

Published on 25 Mar 2026 - 11:09

score 127 · Answer 13 · 2026-03-22 13:53:22

127

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Is it possible to construct two subsequences of a sequence X with specific properties such that the two subsequence sums are the same?

Published on 22 Mar 2026 - 13:53

score 61 · Answer 14 · 2026-03-25 22:05:27

61

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Find Two Numbers $x$ and $y$ such that $(x+1)(y+1)-1$ is 1 less than a multiple of $5$

Published on 25 Mar 2026 - 22:05

score 37 · Answer 15 · 2026-03-25 19:12:07

37

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what are the different factors (other than 1) of number containing following primes

Published on 25 Mar 2026 - 19:12

List Question

How to find the sum of the following series from $n=0$ to $n=99$

K-subsets, counting, and the pigeon hole principle

Integer partitions: number of even parts

Is $577^3$ the smallest cube that is expressible as the sum of $3$ positive cubes in $6$ different ways?

Total number of questions

Creating 6 Digit Numbers Whose Adjacent Digits are Relatively Prime

Generating functions (parts equal to $2$)

Building an equation (inverse combinatorics?), then identifying the optimal pattern

Where am I mistaken in my approach through PIE?

How can I prove that $\frac{1}{\sqrt{1-4x}}=\sum_{n=0}^{\infty} \binom {2n} {n} x^n$

Prove that the set $[0,1]\setminus E$ has Lebesgue measure zero.

Binomial Coefficient deck of cards probability question

Is it possible to construct two subsequences of a sequence X with specific properties such that the two subsequence sums are the same?

Find Two Numbers $x$ and $y$ such that $(x+1)(y+1)-1$ is 1 less than a multiple of $5$

what are the different factors (other than 1) of number containing following primes

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