Find the number of terms in the following series.
20, 24, 28, 32, ........, 216
Show answer & explanation
Correct answer: B
Explanation
Given:
Series = 20, 24, 28, 32, ......., 216
Formula:
Number of terms in AP
n = (last term − first term) / common difference + 1
First term (a) = 20
Common difference (d) = 24 − 20 = 4
Last term (l) = 216
n = (216 − 20) / 4 + 1
= 196 / 4 + 1
= 49 + 1
= 50