Ques:- The largest natural number which exactly divides the product of any four consecutive natural numbers is
A. 6
B. 12
C. 24
D. 120
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