q: A 160 meter long train crosses a man standing on the platform in 9 sec. What is the speed of the train?
Options:
(A) 96 kmph
(B) 64 kmph
(C) 52 kmph
(D) 86 kmph
(E) 76 kmph
a: Stream of consciousness: S = 160/9 * 18/5 = 64 kmph The answer is (B).

question: Find the average of the first 41 natural numbers?
Options:
(A) 8
(B) 9
(C) 10
(D) 11
(E) 21
answer: Stream of consciousness: Average of the first 'n' natural numbers = (n + 1)/2
We get (41 + 1)/2 = 21 The answer is (E).

q: Calculate the speed of a boat in still water (in km/hr) if in one hour, the boat goes 10 km/hr downstream and 4 km/hr upstream.
Options:
(A) 7 kmph
(B) 8 kmph
(C) 9 kmph
(D) 7 kmph
(E) 6 kmph
a: Stream of consciousness: Speed in still water = (10 + 4)1/2 kmph = 7 kmph. The answer is (A).

question: A no.when divided by 221 gives a remainder 43, what remainder will be obtainedby dividingthe same no.17?
Options:
(A) 3
(B) 6
(C) 9
(D) 11
(E) 14
answer: Stream of consciousness: 221 + 43 = 264/17 = 9 (Remainder) The answer is (C).

q: If rupee one produces rupees nine over a period of 40 years, find the rate of simple interest?
Options:
(A) 22 1/6 %
(B) 22 8/2 %
(C) 25 1/2 %
(D) 22 1/2 %
(E) 22 5/2 %
a: Stream of consciousness: 9 = (1*40*R)/100
R = 22 1/2 % The answer is (D).

q: A train 280 m long, running with a speed of 63 km/hr will pass a tree in?
Options:
(A) 22 sec
(B) 16 second
(C) 77 sec
(D) 55 sec
(E) 17 sec
a:
Stream of consciousness: Speed = 63 * 5/18 = 35/2 m/sec
Time taken = 280 * 2/35 = 16 sec The answer is (B).