Find the sum of the first 15 multiples of 8

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asked Feb 2, 2018 in Mathematics by Kundan kumar (49,132 points) 34 379 1010
Find the sum of the first 15 multiples of 8.

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answered Feb 2, 2018 by Vikash Kumar (144,729 points) 8 11 21
 
Best answer

The first 15 multiples of 8 are
8, 16, 24, ... 120
Clearly, these numbers are in AP with first term a=8 and common difference, d=16-8=8

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