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Integer y equals the sum of all multiples of 21 between 210 and 441, inclusive. What is the greatest prime factor of y?

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Integer y equals the sum of all multiples of 21 between 210 and 441, inclusive. What is the greatest prime factor of y?

by BTGmoderatorDC » Thu Jan 07, 2021 5:41 pm

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Integer y equals the sum of all multiples of 21 between 210 and 441, inclusive. What is the greatest prime factor of y?

A. 7
B. 11
C. 19
D. 31
E. 37


OA D

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