q: In what time a sum of money double itself at 7% per annum simple interest?
Options:
(A) 33 1/8%
(B) 33 1/3%
(C) 14 2/7%
(D) 33 4/3%
(E) 73 1/3%
a: Stream of consciousness: P = (P*7*R)/100
R = 14 2/7% The answer is (C).
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q: In what time will a railway train 60 m long moving at the rate of 36 kmph pass a telegraph post on its way?
Options:
(A) 5 sec
(B) 4 sec
(C) 3 sec
(D) 6 sec
(E) 1 sec
a: Stream of consciousness: T = 60/36 * 18/5 = 6 sec The answer is (D).
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q: How much is 80% of 40 is greater than 4/5 of 25?
Options:
(A) 29
(B) 776
(C) 66
(D) 12
(E) 99
a:
Stream of consciousness: (80/100) * 40 (4/5) * 25
32 - 20 = 12 The answer is (D).
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