question: If 1/2 of the air in a tank is removed with each stroke of a vacuum pump, what fraction of the original amount of air has been removed after 1 strokes ?
Options:
(A) 1/2
(B) 7/8
(C) 1/4
(D) 1/8
(E) 1/16
answer: Stream of consciousness: Left After 1st stroke = 1/2
So removed = 1- 1/2 = 1/2 The answer is (A).

q: Find the largest 4 digit number which isexactly divisible by 88?
Options:
(A) 2413
(B) 4356
(C) 9944
(D) 7939
(E) 4674
a: Stream of consciousness: Largest 4 digit number is 9999
After doing 9999 88 we get remainder 55
Hence largest 4 digit number exactly divisible by 88 = 9999 - 55 = 9944 The answer is (C).

question: A man can row a boat at 10 kmph in still water and the speed of the stream is 8 kmph. What is then time taken to row a distance of 90 km down the stream ?
Options:
(A) 8hrs
(B) 5 hrs
(C) 15 hrs
(D) 15 hrs
(E) 20 hrs
answer: Stream of consciousness: Speed in down stream = 10 +8 = 18
Time taken to cover 90 km down stream = 90/18 = 5 hrs. The answer is (B).

q: Convert the 12/43 m/s into kilometers per hour?
Options:
(A) 3.5 kmph.
(B) 2.5 kmph.
(C) 1 kmph.
(D) 1.5 kmph.
(E) 1.9 kmph.
a: Stream of consciousness: 12/43 m/s = 12/43 * 18/5 = 1 (1/250) = 1 kmph. The answer is (C).

question: Two trains are moving at 50 kmph and 70 kmph in opposite directions. Their lengths are 150 m and 100 m respectively. The time they will take to pass each other completely is?
Options:
(A) 7 1/6 sec
(B) 7 3/2 sec
(C) 7 1/7 sec
(D) 7 1/2 sec
(E) 3 3/2 sec
answer: Stream of consciousness: 70 + 50 = 120 * 5/18 = 100/3 mps
D = 150 + 100 = 250 m
T = 250 * 3/100 = 15/2 = 7 1/2 sec The answer is (D).

question: What percent is 120 of 80?
Options:
(A) 150 %
(B) 134 1/3 %
(C) 135 1/3 %
(D) 140 1/3 %
(E) 143 1/3 %
answer:
Stream of consciousness: 120/80 = 3/2
3/2 100 = 300/2 = 150 % The answer is (A).