question: A pipe can fill a tank in 16 hours. Due to a leak in the bottom,it is filled in 24 hours. If the tank is full, how much time will the leak take to empty it ?
Options:
(A) 12 hrs
(B) 24 hrs
(C) 36 hrs
(D) 48 hrs
(E) 42 hrs
answer: Stream of consciousness: Time taken by leak to empty tank = 1/(1/16-1/24) = 48 hrs The answer is (D).

q: What is the units digit of the expression 14^715^4?
Options:
(A) 0
(B) 8
(C) 4
(D) 6
(E) 3
a: Stream of consciousness: I think answer on this one should be B too. Since we know that 14^7>15^4, as Will said one should always check if the number is positive. The answer is (B).

question: If rupee one produces rupees nine over a period of 42 years, find the rate of simple interest?
Options:
(A) 22 1/7 %
(B) 22 3/2 %
(C) 21 3/7 %
(D) 22 1/2 %
(E) 22 1/2 %
answer: Stream of consciousness: 9 = (1*42*R)/100
R = 21 3/7 % The answer is (C).

q: The average age of 8 men increases by 2 years when two women are included in place of two men of ages 20 and 24 years. Find the average age of the women?
Options:
(A) 5
(B) 10
(C) 50
(D) 40
(E) 30
a: Stream of consciousness: 20 + 24 + 8 * 2 = 60/2 = 30 The answer is (E).

question: A train 460 m long is running at a speed of 45 km/hr. In what time will it pass a bridge 140 m long?
Options:
(A) 40
(B) 87
(C) 48
(D) 21
(E) 14
answer: Stream of consciousness: Speed = 45 * 5/18 = 25/2 m/sec
Total distance covered = 460 + 140 = 600 m
Required time = 600 * 2/25 = 48 se The answer is (C).

question: A train 124 m long running at 68 kmph crosses a platform in 19 sec. What is the length of the platform?
Options:
(A) 338
(B) 234
(C) 240
(D) 881
(E) 271
answer:
Stream of consciousness: D = 68 * 5/18 = 19 = 358 124 = 234 The answer is (B).