If x and y are positive integers and n = 5^x + 7^(y+3), what is the units digit of n?

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If x and y are positive integers and n = 5^x + 7^(y+3), what is the units digit of n?

by AAPL » Mon Aug 23, 2021 5:29 am

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If x and y are positive integers and n = 5^x + 7^(y+3), what is the units digit of n?

1) y = 2x - 16
2) y is divisible by 4

OA B

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Source: Beat The GMAT — Data Sufficiency | Mon Aug 23, 2021 5:29 am

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