MathDB
2017 COMC A4

Source:

October 12, 2018
Comc2017 COMC

Problem Statement

Source: 2017 Canadian Open Math Challenge, Problem A4 —-- Three positive integers aa, bb, cc satisfy
4a5b6c=88991010.4^a \cdot 5^b \cdot 6^c = 8^8 \cdot 9^9 \cdot 10^{10}.
Determine the sum of a+b+ca + b + c.