Question

find the smallest positive multiple $n$ of 1994 such that the produc of the divisors of $n$ is $n^{1994}$

score 62 · Answer 1 · 2026-04-14 00:32:02

62

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find the smallest positive multiple $n$ of 1994 such that the produc of the divisors of $n$ is $n^{1994}$

Published on 14 Apr 2026 - 0:32

score 77 · Answer 2 · 2026-04-12 19:16:34

77

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Probability to be infected in series of meetings

Published on 12 Apr 2026 - 19:16

score 66 · Answer 3 · 2026-04-15 04:05:34

66

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How to generate random numbers from density function if it's known that if $X_i$ are iid and $X_i \sim F$, then $F(x_i) \sim U[0,1]$

Published on 15 Apr 2026 - 4:05

score 58 · Answer 4 · 2026-04-10 17:45:05

58

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Equations Proof Solvers

Published on 10 Apr 2026 - 17:45

score 67 · Answer 5 · 2026-04-12 19:28:05

67

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Prove that you can choose three of spotlights.

Published on 12 Apr 2026 - 19:28

score 68 · Answer 6 · 2026-04-14 05:18:12

68

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There are pawns at each of two ending cells of 1 × 20 strip

Published on 14 Apr 2026 - 5:18

score 2.7k · Answer 7 · 2026-04-12 11:11:38

2.7k

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Hard problems solving tricks

Published on 12 Apr 2026 - 11:11

score 103 · Answer 8 · 2026-04-10 08:45:52

103

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Prove: minimal origin-to-ellipse $|z+a|+|z-a|=2r$ lies on minor axis, using complex numbers

Published on 10 Apr 2026 - 8:45

score 447 · Answer 9 · 2026-04-13 22:24:54

447

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find the number of possible positive integer solutions when the inequality is $a \times b \times c \lt 180$

Published on 13 Apr 2026 - 22:24

score 20 · Answer 10 · 2026-04-09 06:12:59

20

Views

How to evaluate performance with increments expressed as percentages?

Published on 09 Apr 2026 - 6:12

score 108 · Answer 11 · 2026-04-17 11:53:30

108

Views

Prove $\frac{|a-c|}{\sqrt{(1+a^2)(1+c^2)}}\leq\frac{|a-b|}{\sqrt{(1+a^2)(1+b^2)}}+\frac{|b-c|}{\sqrt{(1+b^2)(1+c^2)}}$

Published on 17 Apr 2026 - 11:53

score 65 · Answer 12 · 2026-04-17 07:53:41

65

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Find geometric derivation of $\rho(a,b)=\frac{2|a-b|}{\sqrt{1+|a|^2}\sqrt{1+|b^2|}}$ for stereographic projection.

Published on 17 Apr 2026 - 7:53

score 52 · Answer 13 · 2026-04-12 18:31:37

Strategies for a game where players alternate placing $2\times 2$ squares and three-square "L" shapes on a $100\times100$ board

score 43 · Answer 14 · 2026-04-14 10:51:20

43

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To check whether the set $S$ is compact.

Published on 14 Apr 2026 - 10:51

score 1.2k · Answer 15 · 2026-04-16 21:47:54

1.2k

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Let $X$ be the number of $1$s and let $Y$ be the number of $2$s obtained. What is the joint PMF of $X$ and $Y$.

Published on 16 Apr 2026 - 21:47

List Question

find the smallest positive multiple $n$ of 1994 such that the produc of the divisors of $n$ is $n^{1994}$

Probability to be infected in series of meetings

How to generate random numbers from density function if it's known that if $X_i$ are iid and $X_i \sim F$, then $F(x_i) \sim U[0,1]$

Equations Proof Solvers

Prove that you can choose three of spotlights.

There are pawns at each of two ending cells of 1 × 20 strip

Hard problems solving tricks

Prove: minimal origin-to-ellipse $|z+a|+|z-a|=2r$ lies on minor axis, using complex numbers

find the number of possible positive integer solutions when the inequality is $a \times b \times c \lt 180$

How to evaluate performance with increments expressed as percentages?

Prove $\frac{|a-c|}{\sqrt{(1+a^2)(1+c^2)}}\leq\frac{|a-b|}{\sqrt{(1+a^2)(1+b^2)}}+\frac{|b-c|}{\sqrt{(1+b^2)(1+c^2)}}$

Find geometric derivation of $\rho(a,b)=\frac{2|a-b|}{\sqrt{1+|a|^2}\sqrt{1+|b^2|}}$ for stereographic projection.

Strategies for a game where players alternate placing $2\times 2$ squares and three-square "L" shapes on a $100\times100$ board

To check whether the set $S$ is compact.

Let $X$ be the number of $1$s and let $Y$ be the number of $2$s obtained. What is the joint PMF of $X$ and $Y$.

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