Question

Find out between 1 and 100 how many numbers are there which are divisible by 7?

Answer 1

Answer:

14

Step-by-step explanation:

14x7 = 98

So,

14 numbers are there

Answer 2

Step-by-step explanation:

From 1to100 first divisible number by 7 is 7.

last divisible number by 7 is 98.

so, a=7 ,d=7 , an= 98

by an=a+(n-1)d

98=7+(n-1)7

98-7=(n-1)7

91/7=(n-1)

13= n-1

n=13+1=14 numbers.