Aptitude | Arithmetic Aptitude 4 | Question 1
How many numbers between 20 and 451 are divisible by 9?
(A) 44
(B) 48
(C) 50
(D) 52
Answer: (B)
Explanation:
The required numbers are 27, 36, 45……450. This is an A.P. with a = 27 and d = 9 Let it has n terms. Then Tn = 450 = 27 + (n-1) x9 ∴ 450 = 27+ 9n - 9 ∴ 9n = 432 ∴ n = 48