q: Look at this series: 53, 53, 40, 40, 27, 27, ... What number should come next?
Options:
(A) 12
(B) 15
(C) 14
(D) 18
(E) 17
a: In this series, each number is repeated, then 13 is subtracted to arrive at the next number. The answer is (C).
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q: A train 350 m long, running with a speed of 63 km/hr will pass a tree in?
Options:
(A) 22 sec
(B) 16 sec
(C) 17 sec
(D) 88 sec
(E) 20 sec
a: Speed = 63 * 5/18 = 35/2 m/sec
Time taken = 350 * 2/35 = 20 sec The answer is (E).
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q: How many positive integers less than 500 can be formed using the numbers 1,2,3,and 5 for digits, each digit being used only once.
Options:
(A) 22
(B) 34
(C) 73
(D) 26
(E) 11
a: Single digit numbers = 4
Double digit numbers = 4 x 3 = 12
Three digit numbers = 3 x 3 x 2 x 1 = 18
Total = 34 The answer is (B).
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q: The compound ratio of 2/3, 6/7, 4/3 and 1/8 is given by?
Options:
(A) 2/21
(B) 1/48
(C) 1/98
(D) 1/96
(E) 1/68
a:
2/3 * 6/7 * 4/3 * 1/8 = 48/504 = 2/21 The answer is (A).
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