List questions from problem-solving

Published on 09 Apr 2026 - 7:03

375

Views

probability of guessing a k-digit number sequentially from n trials

Published on 14 Apr 2026 - 13:28

105

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finding a matched subset, that meets meets a condition

Published on 12 Apr 2026 - 17:50

312

Views

How to do these Geometry proofs using vectors?

Published on 16 Apr 2026 - 22:13

238

Views

Finding side lengths of a trapezoid given the distance between its diagonal intersection and midpoint of a diagonal

Published on 25 Mar 2026 - 19:04

90

Views

How to find the least value of $\cot x + \frac{\csc^2x+\cot ^4x}{\csc^2x+\cot x}+\tan x + \frac{\sec^2x+\tan^4x}{\sec^2x+\tan x}$?

Published on 16 Apr 2026 - 0:12

516

Views

Similarity by SSA (side-side-angle) in obtuse triangles

Published on 25 Mar 2026 - 19:01

42

Views

When sine is equal to one (depending on multiplier)?

Published on 17 Apr 2026 - 0:57

67

Views

How to solve this second-order ODE?

Published on 12 Apr 2026 - 20:49

120

Views

This (rather long) implicit equation has a short explicit solution, but how can it be found?

Published on 17 Apr 2026 - 12:37

88

Views

Balls and Bins moving from Box A to box B

Published on 14 Apr 2026 - 2:24

151

Views

probability of non of the urns empty

Published on 16 Apr 2026 - 11:46

39

Views

Sum of positive r.v. and Gaussian r.v. in a shrinking interval

Published on 11 Apr 2026 - 13:38

45

Views

Substituition of the integral limit in the first fundemantal theorem of calculus

Published on 15 Apr 2026 - 4:35

56

Views

Solving the system with $y=x$ and $ y=(1-40x)^{-1/51.33}-1$

Published on 16 Apr 2026 - 9:50

List Question

How can I find this distribution function?

probability of guessing a k-digit number sequentially from n trials

finding a matched subset, that meets meets a condition

How to do these Geometry proofs using vectors?

Finding side lengths of a trapezoid given the distance between its diagonal intersection and midpoint of a diagonal

How to find the least value of $\cot x + \frac{\csc^2x+\cot ^4x}{\csc^2x+\cot x}+\tan x + \frac{\sec^2x+\tan^4x}{\sec^2x+\tan x}$?

Similarity by SSA (side-side-angle) in obtuse triangles

When sine is equal to one (depending on multiplier)?

How to solve this second-order ODE?

This (rather long) implicit equation has a short explicit solution, but how can it be found?

Balls and Bins moving from Box A to box B

probability of non of the urns empty

Sum of positive r.v. and Gaussian r.v. in a shrinking interval

Substituition of the integral limit in the first fundemantal theorem of calculus

Solving the system with $y=x$ and $ y=(1-40x)^{-1/51.33}-1$

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