If $a, b,$ and $c$ are positive integers, is $c$ a prime number?

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VJesus12: Legendary Member; Posts: 2276; Joined: Sat Oct 14, 2017 6:10 amFollowed by: 3 members

by VJesus12 » Wed Apr 28, 2021 6:16 am

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If $a, b,$ and $c$ are positive integers, is $c$ a prime number?

(1) $a + b = c$
(2) $a! + b! = c$

Answer: E

Source: GMAT Club Tests

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Source: Beat The GMAT — Data Sufficiency | Wed Apr 28, 2021 6:16 am

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