q: A train 150 meters long completely crosses a 320 meters long bridge in 40 seconds. What is the speed of the train is?
Options:
(A) 32
(B) 42
(C) 54
(D) 66
(E) 09
a: Stream of consciousness: S = (150 + 320)/40 = 470/40 * 18/5 = 42 The answer is (B).

question: The inverse ratio of 3: 7: 1 is?
Options:
(A) 2:3:7
(B) 2:3:9
(C) 2:3:2
(D) 2:3:6
(E) 2:3:1
answer: Stream of consciousness: 1/3: 1/7: 1/1 = 7:3:21 The answer is (E).

q: N number of persons decide to raise 3 lakhs by equal contributions from each. If they contributed 50 each extra, the contribution would be 3.25 lakhs. How many persons are there?
Options:
(A) 600
(B) 400
(C) 450
(D) Cannot be determined
(E) None of these
a: Stream of consciousness: Required persons = 325000300000/50 = 500 The answer is (E).

question: The average of four results is 222 and that of the first three is 219. The fourth result is?
Options:
(A) 231
(B) 201
(C) 85
(D) 192
(E) 215
answer: Stream of consciousness: 4 * 222 3 * 219 = 231 The answer is (A).

q: In a locality, the prevailing price of a 700 square feet property last year was US Dollar 1000. The owner made some additions and the 900 square feet property is now fetching a price of US Dollar 1500. By approximately what percent did the ratio of price to size increase from the previous year's price?
Options:
(A) 12
(B) 14
(C) 17
(D) 21
(E) 19
a: Stream of consciousness: Initial price/area ratio = 1000/700 = 9000/6300
Revised mileage/weight ratio = 1500/900 = 10500/6300 The answer is (C).

q: A train running at the speed of 30 km/hr crosses a pole in 9 seconds. Find the length of the train?
Options:
(A) 75
(B) 65
(C) 25
(D) 288
(E) 212
a:
Stream of consciousness: Speed = 30*(5/18) m/sec = 25/3 m/sec
Length of Train (Distance) = Speed * Time
(25/3) * 9 = 75 meter The answer is (A).