
Ques:- The average age of 12 students is 20 years. If the age of one more student is included, the average decreases by 1. What is the age of the new student?
A. 5 years
B. 6 years
C. 7 years
D. 9 years
Ques:- Four of the following five are alike in a certain way and hence form a group. Which one of the following does not belong to that group?
A. 63
B. 64
C. 39
D. 48
E. 79
Ques:- The difference between the compound interest and the simple interest on a certain sum of money at 5% per annum for 2years is Rs. 1.50. Find the sum.
A. Rs. 800
B. Rs. 1200
C. Rs. 400
D. Rs. 600
E. None of these