Question

find the sum 1st 15 multiple of 8​

Answer 1

Answer:

The answer is 960

Step-by-step explanation:

Any factor of 8 will be in the form '8n'

The first 15 factors would be... 8(1), 8(2), 8(3) and so on.

If we take 8 common.... 8 [1+2+3+4+...+15]

Which gives us 8(120) = 960

Answer 2

Answer:

960

Step-by-step explanation:

The first 15 multiples of 8 are 8,16,24,32,40,48,56,64,72,80,88,96,104,112,120.

So when we add all these multiples, it is 8+16+24+32+40+48+56+64+72+80+88+96+104+112+120= 960