Question

. Find the number of natural number between 50 and 500 which are divisible by 7.​

Answer 1

Answer:

natural no.s between 50 & 500 which are divisible by 7 are:- 56, 63,70,....,497

here ,a= 56 and d= 7

Tⁿ= a+(n-1)×d

497= 56+7n-7

497=49+7n

497-49= 7n

448= 7n

n= 448÷7

n= 64

hence, there are 64 natural numbers between 50 and 500 which are divisible by 7