User Gamow

12

votes

4

answers

1k

views

Professor Halfbrain and the number cycles

mathematics number-theory

Feb 20 '20 at 5:31 JMP 35.1k

4

votes

1

answer

149

views

Ewan, Ries, and Avut

Sep 23 '19 at 15:12 msh210 9,113

2

13

votes

3

answers

1k

views

Spider and fly on a cube

mathematics geometry game

Jan 11 '19 at 18:12 Richard Bennett 21

9

votes

2

answers

439

views

How to beat Count Dracula, part 3

mathematics strategy probability game

May 30 '16 at 13:34 Community♦ 1

2

votes

2

answers

364

views

How to beat Count Dracula, part 2

mathematics strategy probability game

May 28 '16 at 13:29 Community♦ 1

5

33

votes

1

answer

2k

views

Professor Halfbrain and the sum of the digits of all divisors

mathematics number-sequence number-theory reachability

May 25 '16 at 22:15 hexomino 105k

4

14

votes

5

answers

2k

views

Uphill and downhill [closed]

mathematics calculation-puzzle

May 22 '16 at 12:24 Community♦ 1

3

15

votes

9

answers

3k

views

A search game with 2016 numbers

mathematics strategy game

May 17 '16 at 16:33 ghosts_in_the_code 6,559

3

21

votes

1

answer

658

views

A table filled with greatest common divisors

mathematics number-theory

May 12 '16 at 12:14 2012rcampion 13.4k

3

16

votes

6

answers

2k

views

Red cells in a 2016x2016 table

mathematics combinatorics

Apr 16 '16 at 16:29 Community♦ 1

13

votes

1

answer

1k

views

Red cells in a 4x4 table

mathematics combinatorics

Apr 14 '16 at 10:22 Fabich 7,077

1

18

votes

3

answers

2k

views

Professor Halfbrain and numbers with many zeros

mathematics number-theory

Apr 13 '16 at 11:48 kasperd 1,257

1

16

votes

2

answers

469

views

Yet another adventitious triangle

mathematics geometry

Apr 11 '16 at 19:39 Community♦ 1

2

10

votes

2

answers

439

views

Red, blue and yellow points

mathematics geometry

Apr 13 '16 at 17:07 Michael Seifert 1,563

2

20

votes

1

answer

2k

views

A game with 330 pebbles

mathematics strategy combinatorics game

Apr 6 '16 at 11:17 manshu 6,154

1

7

votes

2

answers

575

views

Please make x and y and z

mathematics formation-of-numbers

Apr 2 '16 at 6:16 Community♦ 1

1

6

votes

13

answers

4k

views

A ship departs from Le Havre

mathematics calculation-puzzle puzzle-history

Apr 1 '16 at 16:12 Knight0fDragon 131

3

12

votes

1

answer

548

views

A magical ordering of the positive integers

mathematics combinatorics number-theory

Mar 30 '16 at 18:17 Nautilus 4,830

2

8

votes

2

answers

785

views

A matchstick game

mathematics strategy game matches

Mar 28 '16 at 0:18 ffao 21.1k

2

6

votes

1

answer

229

views

Professor Halfbrain and the wonderful rectangles

geometry combinatorics dissection tiling

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1

11

votes

1

answer

410

views

The adventitious 18-gon

mathematics geometry algebra

Mar 25 '16 at 19:44 Community♦ 1

1

7

votes

4

answers

560

views

Removing green marbles from the table

mathematics strategy game nim

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6

votes

3

answers

289

views

Professor Halfbrain and the tennis club

mathematics combinatorics graph-theory

Mar 25 '16 at 19:21 Nautilus 4,830

10

15

votes

6

answers

725

views

A triangular Quidditch field

mathematics geometry

Mar 25 '16 at 10:19 Community♦ 1

7

votes

2

answers

382

views

Four indeed is cosmic!

mathematics number-sequence reachability

Mar 22 '16 at 18:13 Community♦ 1

14

votes

5

answers

2k

views

A man bought several liters of wine

mathematics algebra puzzle-history

Aug 15 '17 at 14:58 Community♦ 1

1

9

votes

12

answers

3k

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Toy boat on a string

mathematics

Mar 18 '16 at 17:42 Oray 28.5k

10

votes

1

answer

825

views

The second frog concerto

mathematics combinatorics

Mar 18 '16 at 9:08 Community♦ 1

2

9

votes

3

answers

3k

views

A breathtaking way of making every possible positive integer

mathematics formation-of-numbers

Feb 26 '18 at 12:57 jlc 1

4

20

votes

4

answers

1k

views

The frog concerto

mathematics combinatorics

Mar 16 '16 at 23:11 Paul Sinclair 1,208

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197 Questions

Professor Halfbrain and the number cycles

Ewan, Ries, and Avut

Spider and fly on a cube

How to beat Count Dracula, part 3

How to beat Count Dracula, part 2

Professor Halfbrain and the sum of the digits of all divisors

Uphill and downhill [closed]

A search game with 2016 numbers

A table filled with greatest common divisors

Red cells in a 2016x2016 table

Red cells in a 4x4 table

Professor Halfbrain and numbers with many zeros

Yet another adventitious triangle

Red, blue and yellow points

A game with 330 pebbles

Please make x and y and z

A ship departs from Le Havre

A magical ordering of the positive integers

A matchstick game

Professor Halfbrain and the wonderful rectangles

The adventitious 18-gon

Removing green marbles from the table

Professor Halfbrain and the tennis club

A triangular Quidditch field

Four indeed is cosmic!

A man bought several liters of wine

Toy boat on a string

The second frog concerto

A breathtaking way of making every possible positive integer

The frog concerto