Q: If rupee one produces rupees nine over a period of 40 years, find the rate of simple interest?
Options:
(A) 22 1/7%
(B) 22 7/2%
(C) 29 1/2%
(D) 22 1/2%
(E) 22 1/3%
A: OK... Stream of consciousness: 9 = (1*40*R)/100
R = 22 1/2 %
The answer is (D).

Q: There are 9 person among whom 2 are brother. The total no.of ways in which these persons can be seated around a round table so that exactly 1person sit between the brothers, is equal to?
Options:
(A) 4!*2!
(B) 7!*2!
(C) 6!*2!
(D) 2!*1!
(E) 5!*1!
A: OK... Stream of consciousness: Total number of ways = 6!*2!.
The answer is (C).

Q: In filling a room with gas 100 m * 10 m * 10 m the volumes of gas will be?
Options:
(A) 100 cu.m
(B) 1000 cu.m
(C) 10000 cu.m
(D) 100000 cu.m
(E) 10000000 cu.m
A: OK... Stream of consciousness: 100 * 10 * 10 = 10000
The answer is (C).

Q: The salary of a worker is first increased by 30% and afterwards reduced by 30%. What is net change in his salary?
Options:
(A) 90% increase
(B) 45% increase
(C) 9% decrease
(D) Same as before
(E) NONE
A:
OK... Stream of consciousness: (30 * 30)/100 = 9% decrease
The answer is (D).