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(4) Mathematics (Q. No. 91-120)
102. The ratio between two numbers is 3:4 and their L.C.M. is 180. The first number is :-
(a) 60
(b) 45
(c) 20
(d) 15
Answer – b
103. X can do a piece of work in 40 days. He works at it for 8 days and then Y finished it in 16 days. How long will they together take to complete the
work ?
(a) 13 days
(b) 15 days
(c) 20 days
(d) 56 days
Answer – a
106. Two trains running in opposite directions cross a man standing on the platform in 27 seconds and 17 seconds respectively and they cross each other in 23 seconds. The ratio of their speed is –
(a 1: 3
(b) 3 : 2
(c) 3 : 4
(d) None of these
Answer – b
107. A man rows to a place 48 km distant and back in 14 hours. He finds that he can row 4 km with the stream in the same time as 3 km against the stream. The rate of the stream is :-
(a) 1 km/hr
(b) 1.5 km/hr
(c) 1.8 km/ hr
(d) 3.5 km/hr
Answer – a
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