q: The average of first 10 odd numbers is?
Options:
(A) 44
(B) 10
(C) 99
(D) 77
(E) 62
a: Stream of consciousness: Sum of 10 odd no. = 100
Average = 100/10 = 10 The answer is (B).
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q: In what time will a railway train 120 m long moving at the rate of 70 kmph pass a telegraph post on its way?
Options:
(A) 3 sec
(B) 4 sec
(C) 5 sec
(D) 6 sec
(E) 7 sec
a: Stream of consciousness: T = 120/70 * 18/5 = 6 sec The answer is (D).
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q: The floor of a rectangular room is 19 m long and 12 m wide. The room is surrounded by a veranda of width 2 m on all its sides. The area of the veranda is :
Options:
(A) 144 m2
(B) 140 m2
(C) 108 m2
(D) 158 m2
(E) None of these
a:
Stream of consciousness: Area of the outer rectangle = 23 16 = 368 m2
Area of the inner rectangle = 19 12 = 228 m2
Required area = (368 228) = 140 m2 The answer is (B).
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