question: How many seconds will a train 100 meters long take to cross a bridge 180 meters long if the speed of the train is 36 kmph?
Options:
(A) 54 sec
(B) 28 sec
(C) 25 sec
(D) 45 sec
(E) 24 sec
answer: Stream of consciousness: D = 100 + 180 = 280
S = 36 * 5/18 = 10 mps
T = 280/10 = 28 sec The answer is (B).

q: Two trains are traveling on parallel tracks in the same direction. The faster train travels at 130 miles per hour, while the slower train travels at 100 miles per hour. At 2 o'clock the faster train is 15 miles behind the slower one. How far apart are the two trains at 5 o'clock?
Options:
(A) 60 miles
(B) 80 miles
(C) 75 miles
(D) 120 miles
(E) 400 miles
a: Stream of consciousness: Answer = C. 75 miles
Relational speed = 130 - 100 = 30 miles per hour
In 3 hours, difference = 30 * 3 = 90 miles
Fast train trailing 15 miles, so effective difference = 90 - 15 = 75 miles The answer is (C).

question: Four of the five parts numbered (a),(b),(c),(d) and (e) in the following sequence are exactly equal. Which part is not equal to the other four? The number of that part is the answer
Options:
(A) 120 12 22 20
(B) 10% of 5000 + 25 of 1200
(C) 80 40 20 110
(D) 8640 60 + 53.5 16
(E) 5314 3029 1285
answer: Stream of consciousness: The other parts are equal to 1000. The answer is (B).

q: How many terminating zeroes E does 200! have?
Options:
(A) 40
(B) 48
(C) 49
(D) 55
(E) 64
a: Stream of consciousness: You have 40 multiples of 5, 8 of 25 and 1 of 125. This will give 49 zeros. The answer is (C).

question: In what time will a railway train 52 m long moving at the rate of 24 kmph pass a telegraph post on its way?
Options:
(A) 3 sec
(B) 4 sec
(C) 8 sec
(D) 6 sec
(E) 7 sec
answer: Stream of consciousness: T = 52/24 * 18/5 = 8 se The answer is (C).

question: If, when the two parties of knights encounter one another after a month, exactly one knight changes from one travelling party to the other travelling party, that knight must be
Options:
(A) P
(B) Q
(C) R
(D) S
(E) T
answer:
Stream of consciousness: Q because Q always have to travel in northern route The answer is (B).