Tag Archives: Bernardo Recaman

6174: Kaprekar’s constant

Posted on December 15, 2022 by Sumant Sumant

Take any 4 digit number and using its digits find the largest and the smallest 4 digit numbers. Find the difference between the two and repeat the process, you will eventually end up with the number in less than 8 … Continue reading →

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Mary and Lucy’s Coin

Posted on December 15, 2022 by Sumant Sumant

Lucy has forty-eight identical coins. She places half of them, with heads facing up, in a 4 by 6 rectangle. She uses the other twenty-four coins, with tails facing up, to form a frame around the rectangle. Mary has a … Continue reading →

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The Bogota Puzzles by Bernardo Recaman

Posted on December 14, 2022 by Sumant Sumant

“If I feel unhappy, I do mathematics to become happy. If I am happy, I do mathematics to keep happy”. -Alfred Renyi Professor Bernardo (famous for Recaman Sequence) and author of various other books on mathematics including “Los Numeros una … Continue reading →

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Los Numeros: Una historia para contar

Posted on December 14, 2022 by Sumant Sumant

Published in 2016 by famous mathematician and puzzler Bernardo Recaman Santos is a wonderful introduction to subject of mathematics. It will appeal to people of all ages and especially who never liked mathematics. Its filled with stories of his favorite … Continue reading →

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A problem on square number and products of factorial

Posted on December 12, 2022 by Sumant Sumant

Learned this problem from Prof. Bernardo Raccaman. What factorials should be deleted so that the product is a square number ?

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