Question
1440 metres long train crosses a man who is moving in
the same direction with a certain speed in 32 seconds. If the same train can cross a pole in 24 seconds with the same speed, then find the speed of the man.Solution
Let the speed of the man be ‘x’ m/sec. Speed of train = 1440/24 = 60 m/sec Relative speed of the train = (60 – x) m/sec According to the question, => (60 – x) = 1440/32 => x = 60 – 45 => x = 15 Therefore the speed of the man = 15 m/sec
Find the missing number in the given number series.
6, 15, 35, 66, 108, ?143 Â Â Â Â 119Â Â Â Â 107Â Â Â Â 101Â Â Â Â Â 98Â Â Â Â ?
4, 4, 5, ? , 248, 1248
3, 5, 12, 38, 154, ?
Find the missing number in the given number series.
?, 26, 38, 70, 130, 226
72, 79, 100, 135, 184, ?
10296/72 + 3040 = (? × 4) + 1395
What will come in place of the question mark (?) in the following series?
2, 5, 10, 17, 26, ?, 50What should come in place of (?) question mark in the following number series.
1, 2, 6, 24, 120, ?
3   2   3   6   14    ?    115.5
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