Is the square of positive integer Z divisible by 9?

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by BTGmoderatorDC » Mon Jan 04, 2021 5:47 pm

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Is the square of positive integer Z divisible by 9?

(1) The sum of the digits of Z^3 is divisible by 9
(2) 3Z^4 + 16 leaves a remainder of 7 when divided by 9

OA D

Source: e-GMAT

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Source: Beat The GMAT — Data Sufficiency | Mon Jan 04, 2021 5:47 pm

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