q: How long does a bus 100 m long traveling at 50 kmph takes to cross a bridge of 150 m in length?
Options:
(A) 18
(B) 16
(C) 15
(D) 11
(E) 12
a: Stream of consciousness: D = 100 + 150 = 250 m
S = 50 * 5/18 = 125/9
T = 250 * 9/125 = 18 sec The answer is (A).

question: From a group of 7 men and 6 women, five persons are to be selected to form a committee so that at least 3 men are there on the committee. In how many ways can it be done?
Options:
(A) 624
(B) 702
(C) 756
(D) 812
(E) 832
answer: Stream of consciousness: Total men are 7
Total women are 6 so we select 5 peoples in both and at least 3 are men
7c3*6c2+7c4*6c1+7c5*6c0 then we get the 756 The answer is (C).

q: When tossed, a certain coin has equal probability of landing on either side. If the coin is tossed 4 times, what is the probability that it will land on the same side each time?
Options:
(A) 1/8
(B) 1/4
(C) 1/16
(D) 1/2
(E) 1/32
a: Stream of consciousness: Must be either 4 tails or 4 heads
1/2*1/2*1/2*1/2+1/2*1/2*1/2*1/2
1/16 + 1/16 = 1/8 The answer is (A).

question: In a school of 850 boys, 44% of Muslims, 28% Hindus, 10% Sikhs and the remaining of other communities. How many belonged to the other communities?
Options:
(A) 173
(B) 163
(C) 153
(D) 143
(E) 133
answer: Stream of consciousness: 44 + 28 + 10 = 82%
100 82 = 18%
850 * 18/100 = 153 The answer is (C).

q: What number comes next in the following series? 4, 13, 40, 121, 364, x
Options:
(A) 1093
(B) 1100
(C) 1301
(D) 1400
(E) 1713
a: Stream of consciousness: 4
4 3 + 1 = 13
13 3 + 1 = 40
40 3 + 1 = 121
121 3 + 1 = 364
364 3 + 1 = 1093 The answer is (A).

q: The edge of a cube is 4a cm. Find its surface?
Options:
(A) 24a8
(B) 24a4
(C) 96a2
(D) 24a2
(E) 24a7
a:
Stream of consciousness: 6a2 = 6 * 4a * 4a = 96a2 The answer is (C).