4-digit perfect squares May Olympiad (Olimpiada de Mayo) 2018 L2 P1
Source:
September 24, 2021
number theoryDigitsPerfect SquaresPerfect Square
Problem Statement
You have a -digit whole number that is a perfect square. Another number is built adding to the unit's digit, subtracting from the ten's digit, adding to the hundred's digit and subtracting from the ones digit of one thousand. If the number you get is also a perfect square, find the original number. It's unique?