1.  If the number 5 * 2 is divisible by 6, then * = ?

A. 3
B. 2
C. 6
D. 7

Answer: Option B

Explanation:

6 = 3 x 2. Clearly, 5 * 2 is divisible by 2. Replace * by x.

Then, (5 + x + 2) must be divisible by 3. So, x = 2.