A man takes half time in rowing a certain distance downstream than upstream. What is the ratio or the speed in still water to the speed of current?
(a) 1 : 2 (b) 2 : 1 (c) 1 : 3 (d) 3 : 1
Answer: (d)
How many pairs of natural numbers are there such that the difference of whose squares is 63?
(a) 3 (b) 4 (c) 5 (d) 2
Answer: (a)
Which one of the following will have minimum change in its value if s is added to both numerator and the denominator of the fractions 2/3, 3/4, 4/5 and 5/6?
(a) 2/3 (b) 3/4 (c) 4/5 (d) 5/6
Answer: (d)
A digit n > 3 is divisible by 3 but not divisible by 6. Which one of the following is divisible by 4?
(a) 2n (b) 3n (c) 2n + 4 (d) 3n + 1
Answer: (d)
If 1 litre of water weighs 1 kg, then how many cubic millimeters of water will weigh 0.1 gm?
(a) 1 (b) 10 (c) 100 (d) 1000
Answer: (c)
A vessel full of water weighs 4o kg. If it is one-third filled, its weight becomes 20 kg. What is the weight of the empty vessel?
(a) 10 kg (b) 15 kg (c) 20 kg (d) 25 kg
Answer: (a)
A frog tries to come out of a dried well 4.5 m deep with slippery walls. Every time the frog jumps 30 cm, slides down 15 cm. what is the number of jumps required for the frog to come out of the well?
(a) 28 (b) 29 (c) 30 (d) 31
Answer: (b)
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