Question

Convex n-sided polygons whose exterior angles expressed in degrees are in arithmetic progression

score 672 · Answer 1 · 2021-11-13 08:55:43

672

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Convex n-sided polygons whose exterior angles expressed in degrees are in arithmetic progression

Published on 13 Nov 2021 - 8:55

score 4k · Answer 2 · 2026-03-25 18:47:02

4k

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Why does the primorial $23\#$ come up so often in long prime arithmetic progressions?

Published on 25 Mar 2026 - 18:47

score 120 · Answer 3 · 2026-03-29 19:16:32

120

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sequences and series problem - returns on investment

Published on 29 Mar 2026 - 19:16

score 51 · Answer 4 · 2021-11-25 12:43:52

51

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Convex sided polygon with exterior angles in AP

Published on 25 Nov 2021 - 12:43

score 83 · Answer 5 · 2021-12-06 04:25:21

83

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Proving $a_n = a_i + (n - i)d$ by induction

Published on 06 Dec 2021 - 4:25

score 55 · Answer 6 · 2026-03-28 20:05:39

55

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How to find the ith element in two merged arithmetic progressions?

Published on 28 Mar 2026 - 20:05

score 56 · Answer 7 · 2021-12-07 11:20:20

Prove $\frac{1}{u_{0} u_{1}}+\frac{1}{u_{1} u_{2}}+\ldots+\frac{1}{u_{i} u_{i+1}}+\ldots \ldots+\frac{1}{u_{n} u_{n+1}}=\frac{n+1}{u_{0} u_{n+1}}$

score 36 · Answer 8 · 2021-12-08 14:33:11

36

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Primes in the intersection of arithmetic progressions

Published on 08 Dec 2021 - 14:33

score 40 · Answer 9 · 2021-12-21 17:23:05

40

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How to find the RHS of $\sum_{1 \leq a \leq \lfloor{\frac{n}{2}}\rfloor} (n-2a) $

Published on 21 Dec 2021 - 17:23

score 105 · Answer 10 · 2026-03-28 10:16:35

105

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Can we find a palindrome for more than $5$ factors?

Published on 28 Mar 2026 - 10:16

score 128 · Answer 11 · 2021-12-25 08:20:17

128

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Does $\mathbb{N}$ have fewer primes than any arithmetic progression?

Published on 25 Dec 2021 - 8:20

score 35 · Answer 12 · 2026-03-27 21:16:03

35

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Generalised formula for the given series

Published on 27 Mar 2026 - 21:16

score 209 · Answer 13 · 2022-01-13 16:49:42

209

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Number of k-APs in Z/NZ?

Published on 13 Jan 2022 - 16:49

score 16 · Answer 14 · 2026-03-07 12:14:06

16

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Q regarding finding total sum at end of year with an increment till n-1th year.

Published on 07 Mar 2026 - 12:14

score 94 · Answer 15 · 2022-01-19 15:50:54

94

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In an A.P , first term = 2 & sum of first 5 terms is 1/4th of sum of next five terms. Write the equation & find d.

Published on 19 Jan 2022 - 15:50

List Question

Convex n-sided polygons whose exterior angles expressed in degrees are in arithmetic progression

Why does the primorial $23\#$ come up so often in long prime arithmetic progressions?

sequences and series problem - returns on investment

Convex sided polygon with exterior angles in AP

Proving $a_n = a_i + (n - i)d$ by induction

How to find the ith element in two merged arithmetic progressions?

Prove $\frac{1}{u_{0} u_{1}}+\frac{1}{u_{1} u_{2}}+\ldots+\frac{1}{u_{i} u_{i+1}}+\ldots \ldots+\frac{1}{u_{n} u_{n+1}}=\frac{n+1}{u_{0} u_{n+1}}$

Primes in the intersection of arithmetic progressions

How to find the RHS of $\sum_{1 \leq a \leq \lfloor{\frac{n}{2}}\rfloor} (n-2a) $

Can we find a palindrome for more than $5$ factors?

Does $\mathbb{N}$ have fewer primes than any arithmetic progression?

Generalised formula for the given series

Number of k-APs in Z/NZ?

Q regarding finding total sum at end of year with an increment till n-1th year.

In an A.P , first term = 2 & sum of first 5 terms is 1/4th of sum of next five terms. Write the equation & find d.

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