The length of a rectangle is increased by 35% and its breadth is decreased by 20%. What is the effect on its area?
Options:
(A) 10800
(B) 1299
(C) 1000
(D) 10000
(E) 2887

100 * 100 = 10000
135 * 80 = 10800 So the answer is: (A).

Average age of 9 members of a club is 29 years. If 2 more persons with the average age of 40 years have become the members of the club, find average age of all the 11 members.
Options:
(A) 15
(B) 31
(C) 77
(D) 99
(E) 22

Average age of 9 members = 29 years; Excess age of 2 new members = (40 - 29) 2 = 22 years
Therefore, Increase in the average age on inclusion of 2 new members = 22112211 = 2 years
Therefore, Average age of 11 members = 29 + 2 = 31 years So the answer is: (B).

The total population of city A and city B is 5000 more than the total population of city B and city C. How much lesser is the population in city C as compared to city A?
Options:
(A) 8500
(B) 3500
(C) 4500
(D) 5000
(E) 1500

(A + B) - (B + C) = 5000
A - C = 5000 So the answer is: (D).

The simple interest on a sum of money is 4/9 of the principal and the number of years is equal to the rate percent. Find the rate and the time?
Options:
(A) 6 2/3%
(B) 6 2/9%
(C) 6 3/3%
(D) 9 2/3%
(E) 7 2/3%
4/9 P = (P*R*R)/100
R = 20/3 = 6 2/3% So the answer is: (A).