question: A train 540 meters long is running with a speed of 54 kmph. The time taken by it to cross a tunnel 180 meters long is?
Options:
(A) 18 sec
(B) 77 sec
(C) 48 sec
(D) 28 sec
(E) 12 sec
answer: Stream of consciousness: D = 540 + 180 = 720
S = 54 * 5/18 = 15 mps
T = 720/15 = 48 se The answer is (C).
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question: How many Numbers can be formed with digits 2,4,6,8 without repetition?
Options:
(A) 124
(B) 256
(C) 64
(D) 84
(E) 94
answer: Stream of consciousness: Number of one digit numbers = 4
Number of two digit numbers = 4 P 2 = 12
Number of Three digit numbers = 4 P 3 = 24
Number of four digit numbers = 4 P 4 = 24
So, total = 24 + 24 + 12 + 4 = 64 The answer is (C).
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question: A no.when divided by 221 gives a remainder 43, what remainder will beobtained by dividing the same number19?
Options:
(A) 3
(B) 6
(C) 9
(D) 11
(E) 15
answer: Stream of consciousness: 221 + 43 = 264/17 = 9 (Remainder) The answer is (C).
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question: A no. when divided by the sum of 555 and 445 gives 2times their difference as quotient & 40 as remainder. Find the no. is?
Options:
(A) 220044
(B) 145778
(C) 220400
(D) 220014
(E) 220040
answer:
Stream of consciousness: (555 + 445) * 2 * 110 + 30 = 220000 + 30 = 220040 The answer is (E).
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