1.  56, 72, 90, 110, 132, 150
A. 72
B. 110
C. 132
D. 150

Answer: Option D

Explanation:

The numbers are 7 x 8, 8 x 9, 9 x 10, 10 x 11, 11 x 12, 12 x 13.

So, 150 is wrong.