User Gamow

12

votes

4

answers

1k

views

Professor Halfbrain and the number cycles

mathematics number-theory

Feb 20 at 5:31 JMP 35k

4

votes

1

answer

145

views

Ewan, Ries, and Avut

Sep 23 '19 at 15:12 msh210 6,995

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

434

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 96.2k

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 6,499

3

21

votes

1

answer

651

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 7,067

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

466

views

Yet another adventitious triangle

mathematics geometry

Apr 11 '16 at 19:39 Community♦ 1

2

10

votes

2

answers

432

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 6,144

1

7

votes

2

answers

573

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

539

views

A magical ordering of the positive integers

mathematics combinatorics number-theory

Mar 30 '16 at 18:17 Nautilus 4,787

1

8

votes

2

answers

768

views

A matchstick game

mathematics strategy game matches

Mar 28 '16 at 0:18 ffao 21k

2

6

votes

1

answer

224

views

Professor Halfbrain and the wonderful rectangles

geometry combinatorics dissection tiling

Mar 26 '16 at 23:11 f'' 32.1k

1

11

votes

1

answer

406

views

The adventitious 18-gon

mathematics geometry algebra

Mar 25 '16 at 19:44 Community♦ 1

1

7

votes

4

answers

551

views

Removing green marbles from the table

mathematics strategy game nim

Feb 6 at 18:08 user3294068 7,245

6

votes

3

answers

283

views

Professor Halfbrain and the tennis club

mathematics combinatorics graph-theory

Mar 25 '16 at 19:21 Nautilus 4,787

10

15

votes

6

answers

723

views

A triangular Quidditch field

mathematics geometry

Mar 25 '16 at 10:19 Community♦ 1

7

votes

2

answers

378

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

views

Toy boat on a string

mathematics

Mar 18 '16 at 17:42 Oray 27.4k

10

votes

1

answer

824

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

Stack Exchange Network

current community

your communities

more stack exchange communities

Next badge

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