In the following question, select the number which can be placed at the sign of question mark(?) from the given alternatives.
112
144
156
186
C.
156
In first diagram,
236
(2 + 3) = 5
5 x (5 - 1) = 20
(6 + 3) = 9
9 x (9 -1) = 72
In second diagram,
374
(3 + 7) = 10
10 x (10 - 1) = 90
(7 + 4) = 11
11 x (11 - 1) = 110
Similarly,
176
(1 + 7) = 8
8 x (8 - 1) = 56
(7 + 6) = 13
13 x (13 - 1) = 156