1.  If a and b are whole numbers such that ab = 121, then find the value of (a – 1)b + 1 
A. 0
B. 10
C. 100
D. 1000

Answer: Option D

Explanation:

121 = 112 , hence value of a = 11 and b = 2 can be considered.

Therefore, the value of (a – 1)b + 1 = (11 – 1) 2 + 1= 103