q: 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
a: Stream of consciousness: T = 52/24 * 18/5 = 8 se The answer is (C).
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q: A certain car uses 12 gallons of gasoline in traveling 300 miles. In order for the car to travel the same distance using 10 gallons of gasoline, by how many miles per gallon must the car's gas mileage be increased?
Options:
(A) 2
(B) 4
(C) 5
(D) 8
(E) 10
a: Stream of consciousness: 300/10 = 30. The difference is 30 - 25 = 5. The answer is (C).
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q: The H.C.F. of two numbers is 11 and their L.C.M. is 7700. If one of the numbers is 275, then the other is:
Options:
(A) 279
(B) 283
(C) 308
(D) 318
(E) 328
a:
Stream of consciousness: Other number = (11 x 7700)/275 = 308. The answer is (C).
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