Question

Maximum number of non-zero entries ,such that no two non-zero entries are on the same row or column.

score 501 · Answer 1 · 2014-10-01 00:02:23

501

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Maximum number of non-zero entries ,such that no two non-zero entries are on the same row or column.

Published on 01 Oct 2014 - 0:02

score 1.9k · Answer 2 · 2014-10-02 03:49:46

1.9k

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Published on 02 Oct 2014 - 3:49

score 75 · Answer 3 · 2014-10-02 23:54:04

75

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Average rate of speed relative to a given point

Published on 02 Oct 2014 - 23:54

score 7.7k · Answer 4 · 2014-10-03 18:16:18

7.7k

Views

How to find Fantasy Football Playoff Probabilities

Published on 03 Oct 2014 - 18:16

score 499 · Answer 5 · 2026-03-30 09:29:24

499

Views

Why is $2^{16}=65536$ the only power of $2$ less than $2^{31000}$ that doesn't contain the digits $1$, $2$, $4$ or $8$ in its decimal representation?

Published on 30 Mar 2026 - 9:29

score 293 · Answer 6 · 2014-10-04 09:13:44

293

Views

How to prove that $\frac{1}{x_1}+\frac{1}{x_2}+...+\frac{1}{x_n}-\frac{1}{x_1x_2...x_n}\in \mathbb{N}\cup \{0\}$

Published on 04 Oct 2014 - 9:13

score 400 · Answer 7 · 2014-10-06 01:56:28

400

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Loonies and Toonies Combinatorics

Published on 06 Oct 2014 - 1:56

score 2.5k · Answer 8 · 2026-03-27 16:21:10

2.5k

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Published on 27 Mar 2026 - 16:21

score 10.2k · Answer 9 · 2026-03-28 10:04:33

10.2k

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Probabilistic proof of green-eyed dragons logic puzzle

Published on 28 Mar 2026 - 10:04

score 28.4k · Answer 10 · 2026-03-29 18:36:29

28.4k

Views

Is there a shortcut for raising 2 to the power of a number (e.g. $2^{27}$)?

Published on 29 Mar 2026 - 18:36

score 379 · Answer 11 · 2014-10-06 22:47:46

379

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Name of a certain set

Published on 06 Oct 2014 - 22:47

score 65 · Answer 12 · 2026-03-27 05:36:15

65

Views

7th grade percentage question

Published on 27 Mar 2026 - 5:36

score 473 · Answer 13 · 2014-10-07 11:59:02

473

Views

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Published on 07 Oct 2014 - 11:59

score 113 · Answer 14 · 2026-03-26 06:21:05

113

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Can -9 to 9 be placed in 41 lines of zero?

Published on 26 Mar 2026 - 6:21

score 221 · Answer 15 · 2014-10-07 17:07:39

221

Views

If the permuted set of $(1,2, \dots n ) $ is such that sum of any two adjacent numbers is a square. Find the generalized form of $n$.

Published on 07 Oct 2014 - 17:07

List Question

Maximum number of non-zero entries ,such that no two non-zero entries are on the same row or column.

The water heater problem ( mathematician or plumber)??

Average rate of speed relative to a given point

How to find Fantasy Football Playoff Probabilities

Why is $2^{16}=65536$ the only power of $2$ less than $2^{31000}$ that doesn't contain the digits $1$, $2$, $4$ or $8$ in its decimal representation?

How to prove that $\frac{1}{x_1}+\frac{1}{x_2}+...+\frac{1}{x_n}-\frac{1}{x_1x_2...x_n}\in \mathbb{N}\cup \{0\}$

Loonies and Toonies Combinatorics

The Best Problems by Martin Gardner

Probabilistic proof of green-eyed dragons logic puzzle

Is there a shortcut for raising 2 to the power of a number (e.g. $2^{27}$)?

Name of a certain set

7th grade percentage question

Are there tricks to solve seating arrangement problems?

Can -9 to 9 be placed in 41 lines of zero?

If the permuted set of $(1,2, \dots n ) $ is such that sum of any two adjacent numbers is a square. Find the generalized form of $n$.

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