q: How many prime numbers between 1 and 100 are factors of 7150?
Options:
(A) 238
(B) 100
(C) 299
(D) 270
(E) 111
a: Stream of consciousness: Ans: 7, 150 = 2521113
So there are 4 distinct prime numbers that are below 100 The answer is (B).

question: If a man can cover 10 metres in one second, how many kilometres can he cover in 3 hours 45 minutes?
Options:
(A) 288
(B) 162
(C) 145
(D) 135
(E) 130
answer: Stream of consciousness: 10 m/s = 10 * 18/5 kmph
3 hours 45 minutes = 3 3/4 hours = 15/4 hours
Distance = speed * time = 10 * 18/5 * 15/4 km = 135 km. The answer is (D).

q: The length of a rectangle is increased by 25% and its breadth is decreased by 20%. What is the effect on its area?
Options:
(A) 10000
(B) 297
(C) 9279
(D) 2767
(E) 2676
a: Stream of consciousness: 100 * 100 = 10000
125 * 80 = 10000 The answer is (A).

question: A person travels at a speed of 10 mph from one city to another. However while returning as there was not much traffic. He came with a speed of 15mph. what is his average speed?
Options:
(A) 10Kmph
(B) 11Kmph
(C) 12Kmph
(D) 13Kmph
(E) 14Kmph
answer: Stream of consciousness: Average speed = 2xy/(x+y) = (2*15*10)/25 = 12Kmph The answer is (C).

q: There are 7 fictions and 6 non-fictions. How many cases are there such that 2 fictions and 2 non-fictions are selected from them?
Options:
(A) 90
(B) 120
(C) 315
(D) 180
(E) 200
a: Stream of consciousness: Number of ways of selecting 2 fiction books = 7C2
Number of ways of selecting 2 non fiction books = 6C2
7C2 * 6C2 = 21 * 15 = 315 The answer is (C).

q: A train 455 m long, running with a speed of 63 km/hr will pass a tree in?
Options:
(A) 22 sec
(B) 16 sec
(C) 17 sec
(D) 39 sec
(E) 12 sec
a:
Stream of consciousness: Speed = 63 * 5/18 = 35/2 m/sec
Time taken = 455 * 2/35 = 39 sec The answer is (D).