Question

How many numbers are there in between 9 and 89 which are divisible by 7?​

Answer 1

Answer:

Step-by-step explanation

12

Answer 2

Here ,

a = 14 , d = 7 , $a_n$ = 84

Therefore ,

$a_n$ = 84

=> a + (n-1)d = 84

=>14 + (n-1)7 = 84

=> (n-1) = $\frac{84-14}{7}$

=> (n-1) = 10

=> n = 11

Therefore , there are 11 numbers between 9 and 89 , which are divisible by 7 .