Question

Is there a question that contains no numbers except $1$, whose answer is $\pi/7$?

score 440 · Answer 1 · 2026-03-27 16:26:52

440

Views

Is there a question that contains no numbers except $1$, whose answer is $\pi/7$?

Published on 27 Mar 2026 - 16:26

score 241 · Answer 2 · 2023-05-28 19:10:09

241

Views

Is $\pi$ almost surely normal? A reference request.

Published on 28 May 2023 - 19:10

score 70 · Answer 3 · 2026-03-28 06:31:00

70

Views

Prove $\lim_{n\to\infty}\int_0^{a} \left(\sqrt{2n/\pi-x^2}-\sqrt{2n/\pi-a^2}\right)dx=1/6$ where $a$ is the largest real root of $4x^6+x^2=2n/\pi$.

Published on 28 Mar 2026 - 6:31

score 258 · Answer 4 · 2023-06-04 02:06:18

Show $\pi ≈ \frac{4\sum_{i=0}^\infty\left(\left\lfloor \frac{5^k}{4i+1}\right\rfloor-\left\lfloor\frac{5^k}{4i+3}\right\rfloor\right)-2(k+1)}{5^k}$

score 58 · Answer 5 · 2023-06-09 09:07:07

58

Views

Is the limit of this sequence indeed 2 over Pi?

Published on 09 Jun 2023 - 9:07

score 131 · Answer 6 · 2026-03-25 14:25:12

131

Views

Proving $\sum_{k=1}^\infty\left(\frac{(n^k+1)}{(n+1)^k}\zeta(k+1)\right)=\psi(\frac{n}{n+1})-\psi(\frac{1}{n+1})=\pi\cot(\frac{\pi}{n+1})$

Published on 25 Mar 2026 - 14:25

score 82 · Answer 7 · 2023-06-13 12:10:03

82

Views

Estimate $\pi$ using a 3D Random Walk.

Published on 13 Jun 2023 - 12:10

score 81 · Answer 8 · 2023-06-15 06:21:19

81

Views

Simplifying a double summation related to a Ramanujan-type pi formula $1/\pi$?

Published on 15 Jun 2023 - 6:21

score 52 · Answer 9 · 2023-06-22 09:42:51

52

Views

Limit involving $\pi$ and the Fibonacci sequence.

Published on 22 Jun 2023 - 9:42

score 59 · Answer 10 · 2023-06-22 19:17:04

59

Views

Representing logical operations in math/logical notation.

Published on 22 Jun 2023 - 19:17

score 33 · Answer 11 · 2023-06-25 13:26:37

33

Views

Exponential Function with big exponents

Published on 25 Jun 2023 - 13:26

score 81 · Answer 12 · 2023-06-30 17:49:55

81

Views

Does $\sin^{-1}$ abide with the trig exponent notation?

Published on 30 Jun 2023 - 17:49

score 66 · Answer 13 · 2026-03-26 16:04:55

66

Views

Rationality of artan(2/pi)

Published on 26 Mar 2026 - 16:04

score 70 · Answer 14 · 2023-07-04 08:56:33

70

Views

Using Taylor Series to approximate pi without using arctan?

Published on 04 Jul 2023 - 8:56

score 104 · Answer 15 · 2026-02-23 12:05:31

104

Views

Why does the exponent rule [If $a^b = a^c,$ then $b=c$] not apply to imaginary numbers

Published on 23 Feb 2026 - 12:05

List Question

Is there a question that contains no numbers except $1$, whose answer is $\pi/7$?

Is $\pi$ almost surely normal? A reference request.

Prove $\lim_{n\to\infty}\int_0^{a} \left(\sqrt{2n/\pi-x^2}-\sqrt{2n/\pi-a^2}\right)dx=1/6$ where $a$ is the largest real root of $4x^6+x^2=2n/\pi$.

Show $\pi ≈ \frac{4\sum_{i=0}^\infty\left(\left\lfloor \frac{5^k}{4i+1}\right\rfloor-\left\lfloor\frac{5^k}{4i+3}\right\rfloor\right)-2(k+1)}{5^k}$

Is the limit of this sequence indeed 2 over Pi?

Proving $\sum_{k=1}^\infty\left(\frac{(n^k+1)}{(n+1)^k}\zeta(k+1)\right)=\psi(\frac{n}{n+1})-\psi(\frac{1}{n+1})=\pi\cot(\frac{\pi}{n+1})$

Estimate $\pi$ using a 3D Random Walk.

Simplifying a double summation related to a Ramanujan-type pi formula $1/\pi$?

Limit involving $\pi$ and the Fibonacci sequence.

Representing logical operations in math/logical notation.

Exponential Function with big exponents

Does $\sin^{-1}$ abide with the trig exponent notation?

Rationality of artan(2/pi)

Using Taylor Series to approximate pi without using arctan?

Why does the exponent rule [If $a^b = a^c,$ then $b=c$] not apply to imaginary numbers

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