Question

Between 200 and 400 how many numbers are divisible by 7?

Answer 1

a = 203
d= 7
l= 399
399 = 203+(n-1)7

n-1= 196/7
n= 29

Answer 2

A=203,210......392 is divide by 7
A/Q formula

392=203+(n+1)7
392=203+7n-7
392=196+7n
196=7n
196/7=n
N=28. - ANS