Question

Find the sum of first 10 multiples of 6​

Answer 1

Answer:

330

Step-by-step explanation:

First 10 multiples of 6 are :

6 , 12 , 18 ... 54 , 60.

Here,

• a = first term = 6
• d = common difference = 6

Now,

We know the formula that :

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

To find the Sum of 10 terms,

S10 = 10 / 2 [ 2 × 6 + ( 10 - 1 ) × 6 ]

S10 = 5 × [ 12 + 54 ]

S10 = 5 × 66

S10 = 330

Thus,

We got the sum as 330.

Sum of first 10 multiples of 6 is 330.

__________________________

Answer 2

Answer:

330

Step-by-step explanation:

6+12+18+.........+60

=6*(1+2+3+..........+10)

=6*10*11/2 ( Sum of no 1 to 10=10*11/2)

=6*5*11

=330