Question
What number should replace the question mark?

A. 214
B. 114
C. 218
D. 96
Answer: C. 218
Solution:
Square 1:
11 x 7 = 77 …(I)
17 x 9 = 153 …(II)
Difference between (I) & (II): 153 – 77 = 76
Square 2:
13 x 11 = 143 …(I)
17 x 11 = 187 …(II)
Difference between (I) & (II): 187 – 143 = 44
Square 3:
27 x 8 = 216…(I)
31 x 14 = 434…(II)
Difference between (I) & (II): 434 – 216= 218
Hence, the answer is 218.