Question

find the sum of first 7 numbers which are multiples of 2 as well as of 9

Answer 1

The firt seven numbers that are divisible by 2 and 9 as well are "18, 36, 54, 72, 90, 108, 126"
Now, the sum of all the seven numbers = 18+36+54+72+90+108+126 = 504

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