In mathematics, a natural number in a given number base is a p {\displaystyle p} -Kaprekar number if the representation of its square in that base can be split into two parts, where the second part has p {\displaystyle p} digits that add up to the original number. For example, in base 10, 45 is a 2-Kaprekar number, because 452 = 2025, and 20 + 25 = 45.
In mathematics, a natural number in a given number base is a p {\displaystyle p} -Kaprekar number if the representation of its square in that base can be split into two parts, where the second part has p {\displaystyle p} digits that add up to the original number. For example, in base 10, 45 is a 2-Kaprekar number, because 452 = 2025, and 20 + 25 = 45.
Source: Wikipedia "Kaprekar number" · CC BY-SA 4.0
Share this article: X · Bluesky