Question

What is the distribution of the outcome of this game?

score 69 · Answer 1 · 2026-04-12 00:04:32

69

Views

What is the distribution of the outcome of this game?

Published on 12 Apr 2026 - 0:04

score 78 · Answer 2 · 2026-04-14 03:25:03

78

Views

Write $AS$ as a multiple of $AD$ and $CS$ as a multiple of $CE$.

Published on 14 Apr 2026 - 3:25

score 94 · Answer 3 · 2026-04-12 05:27:36

94

Views

What is this called in Mathematics

Published on 12 Apr 2026 - 5:27

score 25 · Answer 4 · 2026-04-14 16:58:29

25

Views

Find a constant $c$ that best approximates $X$ in $L^1$.

Published on 14 Apr 2026 - 16:58

score 46 · Answer 5 · 2026-04-21 21:31:30

46

Views

If $\tan x\tan y=\frac{b}{a},\,a,\,b\ne 0$, prove that $\frac{\sec^2x}{a\tan^2x+b}+\frac{\sec^2y}{a\tan^2y+b}=\frac{a+b}{ab}$

Published on 21 Apr 2026 - 21:31

score 126 · Answer 6 · 2026-04-14 19:05:29

126

Views

How to seat $2n$ people, where each person hates at most $n-1$ people, such that everyone sits besides his/her friends in a circle?

Published on 14 Apr 2026 - 19:05

score 42 · Answer 7 · 2026-04-12 11:36:21

42

Views

How to solve these trigonometric equations, using angle addition equations?

Published on 12 Apr 2026 - 11:36

score 65 · Answer 8 · 2026-04-16 20:20:07

65

Views

How to get $A$ and $B$ from $A\csc 10^\circ+B=$ $\sin 10^\circ+\cos 60^\circ+\cos 40^\circ+\sin 70^\circ+\sin 90^\circ$?

Published on 16 Apr 2026 - 20:20

score 180 · Answer 9 · 2026-04-17 15:24:17

180

Views

To need a way of thinking about Ji_Chen's nice result $(a- c)^{2}+ (b- d)^{2}\geq\frac{7}{9}ab- \frac{7}{20}(c^{2}+ 4d^{2})$

Published on 17 Apr 2026 - 15:24

score 112 · Answer 10 · 2026-04-16 15:19:42

112

Views

Question about Sui Zhen Lin's proof for inequality $\sqrt{\frac{a^2}{9b^2-8b+4}}+\sqrt{\frac{4b}{a+4}}\leq 1$ with positive numbers $a,b$ so $a+b=1$

Published on 16 Apr 2026 - 15:19

score 102 · Answer 11 · 2026-04-09 17:27:21

102

Views

Given a scalene triangle $ABC$ with $H$ orthocenter, prove that two lines are parallel

Published on 09 Apr 2026 - 17:27

score 122 · Answer 12 · 2026-04-14 14:54:46

122

Views

Given a scalene triangle and its orthocenter, prove that a point on its Euler circle, has a constant line segment

Published on 14 Apr 2026 - 14:54

score 111 · Answer 13 · 2026-04-11 16:29:17

111

Views

Combo problem, complementary counting

Published on 11 Apr 2026 - 16:29

score 171 · Answer 14 · 2026-04-16 16:57:26

171

Views

A $56$-digit number divisible by $13$

Published on 16 Apr 2026 - 16:57

score 65 · Answer 15 · 2026-04-15 20:35:53

65

Views

GCSE: Find the number of person that will go to a party

Published on 15 Apr 2026 - 20:35

List Question

What is the distribution of the outcome of this game?

Write $AS$ as a multiple of $AD$ and $CS$ as a multiple of $CE$.

What is this called in Mathematics

Find a constant $c$ that best approximates $X$ in $L^1$.

If $\tan x\tan y=\frac{b}{a},\,a,\,b\ne 0$, prove that $\frac{\sec^2x}{a\tan^2x+b}+\frac{\sec^2y}{a\tan^2y+b}=\frac{a+b}{ab}$

How to seat $2n$ people, where each person hates at most $n-1$ people, such that everyone sits besides his/her friends in a circle?

How to solve these trigonometric equations, using angle addition equations?

How to get $A$ and $B$ from $A\csc 10^\circ+B=$ $\sin 10^\circ+\cos 60^\circ+\cos 40^\circ+\sin 70^\circ+\sin 90^\circ$?

To need a way of thinking about Ji_Chen's nice result $(a- c)^{2}+ (b- d)^{2}\geq\frac{7}{9}ab- \frac{7}{20}(c^{2}+ 4d^{2})$

Question about Sui Zhen Lin's proof for inequality $\sqrt{\frac{a^2}{9b^2-8b+4}}+\sqrt{\frac{4b}{a+4}}\leq 1$ with positive numbers $a,b$ so $a+b=1$

Given a scalene triangle $ABC$ with $H$ orthocenter, prove that two lines are parallel

Given a scalene triangle and its orthocenter, prove that a point on its Euler circle, has a constant line segment

Combo problem, complementary counting

A $56$-digit number divisible by $13$

GCSE: Find the number of person that will go to a party

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