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MathNet 2018-part-03 — 181 problems (EN–VI) Question 176

Math Olympiad Vault · MathNet 2018-part-03 — 181 problems (EN–VI)

Question 176

Determine $a$ and $b$ in the following:
$$
(5!)^{8} + (5!)^{7} = 4a,356,487,b80,000,000
$$