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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
4 votes
2 answers
349 views

Primes and squares in a grid

10 votes
2 answers
1k views

Sixteen chess pieces on a square board

15 votes
2 answers
3k views

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

9 votes
2 answers
1k views

A Triangle of Squares

8 votes
1 answer
195 views

My Eight Cousins

0 votes
1 answer
137 views

Gaby's 21 students sitting around a circle [closed]

2 votes
1 answer
155 views

How many 𝑛-digit integers have the property that the block of its first 𝑘 digits is a prime or divisible by 𝑘 for all 1 ≤ 𝑘 ≤ 𝑛?

7 votes
3 answers
1k views

I am thinking of a number

4 votes
1 answer
207 views

More primes and squares, in a summation triangle

3 votes
1 answer
184 views

My sixteen graph theory students

-3 votes
1 answer
204 views

Four rational numbers whose product is 10 and whose sum is 0

1 vote
2 answers
597 views

Anne and Bernard's marbles

3 votes
1 answer
159 views

Sixteen cards on a table

-5 votes
1 answer
203 views

Elections in the United States of Alfagonia

3 votes
2 answers
755 views

Yet another mixed sum

5 votes
3 answers
1k views

Numbers which use three times as many digits in base 2 as in base 10

5 votes
2 answers
210 views

Consecutive numbers whose digital sum in base 10 is the same as in base 2

5 votes
2 answers
1k views

Paying bills in Alphagonia

16 votes
5 answers
1k views

Is equality possible?

5 votes
1 answer
194 views

Pandigital POSTERIAL

1 vote
1 answer
661 views

The ID of my next Zoom meeting

17 votes
5 answers
3k views

Slimming down integers to a single digit

2 votes
1 answer
177 views

My Latest Password

10 votes
1 answer
1k views

Pairs of Bogotá Numbers

4 votes
3 answers
1k views

Moving matches to produce largest possible number

7 votes
2 answers
1k views

Seventeen positive integers

1 vote
1 answer
196 views

On certain triplets of consecutive integers [closed]

28 votes
1 answer
3k views

How many silver marbles does Paul have?

10 votes
4 answers
1k views

Smallest integer whose first n multiples contain the digit 1

17 votes
3 answers
1k views

Largest and smallest dodecagon with sides $1, 2, 3, \dots,12$

1 2 3
4
5
7