Bernardo Recamán Santos's user avatar
Bernardo Recamán Santos's user avatar
Bernardo Recamán Santos's user avatar
Bernardo Recamán Santos
  • Member for 8 years
  • Last seen this week
15 votes
2 answers
3k views

Three queens and two rooks covering the chess board... again!

15 votes
4 answers
3k views

Many many thanks

15 votes
2 answers
1k views

Colombian Sudoku

14 votes
1 answer
1k views

My Social Security Card Number

14 votes
4 answers
3k views

Mother and Daughter

14 votes
2 answers
863 views

Happy birthday Ramanujan!

13 votes
1 answer
893 views

Gaby's Puzzle (Primes Around a Circle)

13 votes
5 answers
5k views

My five daughters

13 votes
2 answers
3k views

My Three Children

13 votes
3 answers
2k views

Restoring order in a deck of playing cards (I)

13 votes
2 answers
2k views

My Graph Theory Students

13 votes
3 answers
1k views

The Mxied Atdiiodn

13 votes
4 answers
2k views

A Magic Super Star

12 votes
8 answers
3k views

Four ones and four zeros

12 votes
6 answers
1k views

Twenty-four coins

12 votes
2 answers
1k views

Introducing S-sequences: which is the shortest to contain all integers 1 to 20?

12 votes
0 answers
207 views

The Snake and the Hunter

12 votes
5 answers
1k views

Labelling a Snow Flake Graph to Attain Minimum Sum

12 votes
2 answers
1k views

Hearts and Spades in a Row

12 votes
4 answers
1k views

Largest and smallest hexadecagon with sides 1, 2, 3, ...,16

12 votes
2 answers
1k views

The Puzzling Reverse and Add Sequence

12 votes
1 answer
545 views

Three white queens, two white knights, and one rook on a chess board

11 votes
1 answer
1k views

My grandfather's coins

11 votes
2 answers
1k views

Splitting the Primes

11 votes
1 answer
741 views

Generating all hexominoes by cutting and pasting

11 votes
3 answers
538 views

EDUCATION becomes a pandigital number

11 votes
5 answers
2k views

Aces, twos, threes, and fours in a row

11 votes
3 answers
1k views

Another Colombian Sudoku

11 votes
2 answers
1k views

Winning the Lottery

11 votes
4 answers
2k views

A Magic Diamond

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