What number should logically replace the question mark?

Question

A. 12

B. 16

C. 15

D. 4

Solution:

Logic::

In each row and column, the third number is the product of the first two numbers divided by four.

6 x 8 = 48 / 4 = 12

10 x 2 = 20 / 4 = 5

15 x 4 = 60 / 4 = 15

Hence, The Answer is 15.

In the following question, if one term in the number series is wrong, find out the wrong term. 1, 3, 12, 25, 48	What is next number 1, 7, 17, 23, 33, ____?
Which of the following is a common factor of both x^2 – 4x – 5 and x^2 – 6x – 7?	The least number which should be added to 28523 so that the sum is exactly divisible by 3, 5, 7 and 8 is