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How do you win the simple math game 20-19?

score 657 · Answer 1 · 2026-04-14 08:26:12

657

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How do you win the simple math game 20-19?

Published on 14 Apr 2026 - 8:26

score 728 · Answer 2 · 2026-04-14 14:28:03

728

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If three distinct integers are chosen at random, show that there will exist two among them, say $a$ and $b$, such that $30 | (a^3b-ab^3)$

Published on 14 Apr 2026 - 14:28

score 5.8k · Answer 3 · 2026-04-15 01:09:45

5.8k

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Show that a generalized knight can return to its original position only after an even number of moves

Published on 15 Apr 2026 - 1:09

score 686 · Answer 4 · 2026-04-10 19:41:15

686

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How to calculate participant*hours

Published on 10 Apr 2026 - 19:41

score 76 · Answer 5 · 2015-12-05 20:48:57

76

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When 0/0 is not a number, which other arithmetic operations on numbers can yield non-number results?

Published on 05 Dec 2015 - 20:48

score 832 · Answer 6 · 2026-03-21 13:15:16

832

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How can I prove that $2^{\sqrt 7}$ is bigger than $5$?

Published on 21 Mar 2026 - 13:15

score 7.4k · Answer 7 · 2026-03-26 01:13:33

7.4k

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Gaussian prime factorization.

Published on 26 Mar 2026 - 1:13

score 3k · Answer 8 · 2026-04-10 02:13:21

3k

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Team Fortress 2: Choosing Between Two Weapons

Published on 10 Apr 2026 - 2:13

score 59 · Answer 9 · 2026-04-15 06:23:02

59

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Calculating stop light intervals based on current time.

Published on 15 Apr 2026 - 6:23

score 717 · Answer 10 · 2026-04-15 03:12:18

717

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Clarification regarding Spivak, exercise 1-24

Published on 15 Apr 2026 - 3:12

score 9.5k · Answer 11 · 2026-04-15 02:58:04

9.5k

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Divide a number to unequal parts

Published on 15 Apr 2026 - 2:58

score 33 · Answer 12 · 2026-04-11 13:30:30

33

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Ball Stacking Permutation Debate

Published on 11 Apr 2026 - 13:30

score 4.9k · Answer 13 · 2026-03-29 05:12:17

4.9k

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If x is real , the numbers $ 5^{1+x} + 5^{1-x} $ , a/2 , $ 25^x + 25^{-x} $ form an A.P. then to which interval must ' a ' belong to?

Published on 29 Mar 2026 - 5:12

score 457 · Answer 14 · 2026-04-13 18:59:19

457

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Sum of an arithmetic progression

Published on 13 Apr 2026 - 18:59

score 120 · Answer 15 · 2026-04-11 10:30:09

120

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How to prove $r^3+1 = (r+1)(r^2-r+1)$

Published on 11 Apr 2026 - 10:30

List Question

How do you win the simple math game 20-19?

If three distinct integers are chosen at random, show that there will exist two among them, say $a$ and $b$, such that $30 | (a^3b-ab^3)$

Show that a generalized knight can return to its original position only after an even number of moves

How to calculate participant*hours

When 0/0 is not a number, which other arithmetic operations on numbers can yield non-number results?

How can I prove that $2^{\sqrt 7}$ is bigger than $5$?

Gaussian prime factorization.

Team Fortress 2: Choosing Between Two Weapons

Calculating stop light intervals based on current time.

Clarification regarding Spivak, exercise 1-24

Divide a number to unequal parts

Ball Stacking Permutation Debate

If x is real , the numbers $ 5^{1+x} + 5^{1-x} $ , a/2 , $ 25^x + 25^{-x} $ form an A.P. then to which interval must ' a ' belong to?

Sum of an arithmetic progression

How to prove $r^3+1 = (r+1)(r^2-r+1)$

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