In the following question, a series is given with one term missing. Choose the correct alternative from the given ones that will complete the series.
1 | 2 | 3 |
11 | 7 | 5 |
120 | 45 | ? |
19
16
15
17
B.
16
First Column
(11)2 -(1)2 ⇒ 121 - 1 = 120
Second Column
(7)2 - (2)2 ⇒ 49 - 4 = 45
Third Column
(5)2 - (3)2 ⇒ 25 - 19 = 16