Question

Find the sum of integers between 10 and 500 which are divisible by 7​

Answer 1

Answer:the integer between 10 to 500 divisible by 7 is

14,21,28,35,......

now

=500/7=71.42

the last term should be =71×7=497

now let the n'th term is 497

therefore

497=14+(n-1)7

(497-14+7)/7=n

n=70

therefore sum of 70 terms is

the sum is 17885

hope this helps you!