List questions from problem-solving

Published on 18 Jan 2016 - 19:48

57

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Basic probability exercise

Published on 20 Jan 2016 - 3:39

97

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How many integers less than 2015 are multiples of 2 or 3 (or both)?

Published on 20 Jan 2016 - 9:24

83

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How to find a formula that is true for a given model in the First Order Logic?

Published on 21 Jan 2016 - 2:55

48

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Technical meaning of two alike combinatorial problems

Published on 21 Jan 2016 - 23:26

63

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Find the lenght of a rectangle between two parabolas

Published on 23 Jan 2016 - 14:54

52

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PDF of negative $\cos(X)$

Published on 24 Jan 2016 - 15:50

203

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Launching a Plaintext Attack against Affine Cipher

Published on 01 Apr 2026 - 15:10

81

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Why do people say that some problem is hard when they do not actually prove it?

Published on 04 Apr 2026 - 14:42

631

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Solving modulo equations with one variable

Published on 28 Jan 2016 - 7:39

826

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Is there any easy way to solve two equations with three unknowns?

Published on 28 Jan 2016 - 23:15

317

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How to solve this equation using logs

Published on 29 Jan 2016 - 1:02

1.5k

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What is the probability that the upturned faces of three fair dice are all of different numbers?

Published on 29 Jan 2016 - 22:33

154

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Which is larger, $e^\pi$ or $\pi^e$?

Published on 30 Jan 2016 - 13:55

206

Views

How can the lagrange multipliers in a simple constrained cost minimization problem be calculated? (for binding constraints)

Published on 07 Apr 2026 - 11:14

List Question

Calculate number of sides of cylinder so each side is a certain width

Basic probability exercise

How many integers less than 2015 are multiples of 2 or 3 (or both)?

How to find a formula that is true for a given model in the First Order Logic?

Technical meaning of two alike combinatorial problems

Find the lenght of a rectangle between two parabolas

PDF of negative $\cos(X)$

Launching a Plaintext Attack against Affine Cipher

Why do people say that some problem is hard when they do not actually prove it?

Solving modulo equations with one variable

Is there any easy way to solve two equations with three unknowns?

How to solve this equation using logs

What is the probability that the upturned faces of three fair dice are all of different numbers?

Which is larger, $e^\pi$ or $\pi^e$?

How can the lagrange multipliers in a simple constrained cost minimization problem be calculated? (for binding constraints)

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