Ques:- Find out the wrong number in each sequence:
36, 54, 18, 27, 9, 18.5, 4.5
36, 54, 18, 27, 9, 18.5, 4.5
A. 4.5
B. 8.5
C. 18.5
D. 18
Ques:- Five years ago, the total of the ages of a father and his son was 40 years. The ratio of their present ages is 4 : 1. What is the present age of the father?
A. 20 years
B. 30 years
C. 40 years
D. 50 years