MathDB
IOQM 2021 P30

Source:

January 17, 2021

Problem Statement

Find the number of pairs (a,b)(a,b) of natural nunbers such that bb is a 3-digit number, a+1a+1 divides bāˆ’1b-1 and bb divides a2+a+2a^{2} + a + 2.