1.

How Many Numbers Between 20 And 451 Are Divisible By 9?

Answer»

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.

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.



Discussion

No Comment Found