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2021 Auckland Mathematical Olympiad
4
2021 / 7^m - 7^n (2021 Auckland MO S4)
2021 / 7^m - 7^n (2021 Auckland MO S4)
Source:
November 15, 2021
number theory
powers
divides
divisible
Problem Statement
Prove that there exist two powers of
7
7
7
whose difference is divisible by
2021
2021
2021
.
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