Q: A 140 meter long train crosses a man standing on the platform in 6 sec. What is the speed of the train?
Options:
(A) 228
(B) 108
(C) 84
(D) 188
(E) 211
A: OK... Stream of consciousness: S = 140/6 * 18/5 = 84kmph
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: OK... Stream of consciousness: 9 = (1*40*R)/100
R = 22 1/2 %
The answer is (D).

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 5 miles behind the slower one. How far apart are the two trains at 5 o'clock?
Options:
(A) 60 miles
(B) 80 miles
(C) 90 miles
(D) 120 miles
(E) 85 miles
A: OK... Stream of consciousness: Answer = E. 85 miles
Relational speed = 130 - 100 = 30 miles per hour
In 3 hours, difference = 30 * 3 = 90 miles
Fast train trailing 5 miles, so effective difference = 90 - 5 = 85 miles
The answer is (E).

Q: A multiple choice test consists of 4 questions, and each question has 5 answer choices. In how many ways can the test be completed if every question is unanswered?
Options:
(A) 24
(B) 120
(C) 625
(D) 720
(E) 1024
A:
OK... Stream of consciousness: 5 choices for each of the 4 questions, thus total of 5*5*5*5 = 5^4 = 625 ways.
The answer is (C).