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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, 3 months
  • Last seen this week
5 votes
2 answers
1k views

Swapping the first and last digits of an integer

2 votes
1 answer
745 views

A prolific nine-letter word

11 votes
3 answers
540 views

EDUCATION becomes a pandigital number

17 votes
2 answers
3k views

A Rook's Territory in the Chessboard

12 votes
2 answers
1k views

Fourteen numbers around a circle

6 votes
2 answers
1k views

Primes in a Line

4 votes
1 answer
161 views

Finding the Missing Word in a Crossword

17 votes
4 answers
1k views

Knights in a Complete Sudoku Board

5 votes
2 answers
1k views

Consecutive numbers which use all digits a different number of times

2 votes
0 answers
172 views

Minimum number of clues required for a 16 x 16 Sudoku [duplicate]

37 votes
6 answers
8k views

Rendering the number 10,958 with the string 1 2 3 4 5 6 7 8 9

7 votes
1 answer
780 views

Largest set of independent hexominoes

10 votes
2 answers
1k views

Finding the most flexible of all 35 hexominoes

11 votes
1 answer
771 views

Generating all hexominoes by cutting and pasting

20 votes
1 answer
3k views

Four mathematicians and their ages

5 votes
1 answer
1k views

Playing Collatz with graphs

17 votes
3 answers
1k views

A King's Hamiltonian Tours

11 votes
5 answers
3k views

Aces, twos, threes, and fours in a row

18 votes
2 answers
1k views

Another Rook's Tour

17 votes
4 answers
3k views

My Mother's Dish Collection

21 votes
3 answers
3k views

A rook's tour of the chessboard

19 votes
5 answers
1k views

Primes less than 100 in a 4 x 4 board

14 votes
2 answers
1k views

Happy birthday Ramanujan!

3 votes
1 answer
159 views

Placing three sets of cards Ace to 9 in a row

12 votes
2 answers
1k views

Hearts and Spades in a Row

10 votes
6 answers
3k views

Longest word worth at most a million

4 votes
2 answers
690 views

Primes from arithmetic and geometric progressions

10 votes
2 answers
1k views

A Magic Flying Saucer

10 votes
3 answers
1k views

The Royal Mint of Alphagonia

10 votes
2 answers
1k views

National Graph Lottery

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