Question

Find the sum of all the numbers from 150 to 200 which are divisible by 7​Find the sum of all the numbers from 150 to 200 which are divisible by 7​

Answer 1

Answer:

Step-by-step explanation:

a = 14

d = 7

L = 196

=> a + (n-1) d =196

=> 14 +(n-1) (7) = 196

=> (n-1) (7) = 182

=> n - 1 = 26

=> n = 27

Sn = n/2 ( a + L)

= 27/2 ( 14 +196)

= 27 × 210 /2

= 27 × 105

= 2835