Question

Match the following APs with their missing term.

• A. 23
• B. 18
• C. 21

Answer 1

It is given that the three series form an AP
$1)6,9,12,15,?$
Common difference = 9-6 = 15-12 = 3
Therefore missing term = 15 + 3 = 18

$2)13,17,?,25,29$
Common difference =17-13 =29-25 = 4
Therefore missing term = 17 + 4 = 21


$3)11,14,17,20,?$

Common difference = 14-11 = 17-14 = 3
Therefore missing term = 20 + 3 = 23