Question

Find the sum of 10 multiples of 6

Answer 1

Answer:

330

Step-by-step explanation:

We can go by the below way

6(1+2+3+...+8+9+10)

6(55)

330

Answer 2

Answer:

it's 330.. to solve this equation we can use the arithmetic progression series formula..

Step-by-step explanation:

multiplier of 6 is 6,12,18,24....and so on

a=6,

d=6,

n=10.

therefore Sn= n/2[(2a+n-1) d]

= 10/2 [2(6) +(10-6) ]

=5[12+(9) 6]

=5(12+54)

=5(66)

= 330.......