Question

Which term of the AP 21, 42, 63, 84, … is 210?

(a) 9th (b) 10th (c) 11th (d) 12th

Answer 1

Here, a = 21 and d = (42-21) = 21

Let 210 be the nth term of the given AP.

Hence, 210 is the 10th term of the AP.