Question
Two stations P and Q are 486 km apart. A train leaves P at
6:45 a.m. at 54 km/h. Another train leaves Q at 8:15 a.m. towards P at 81 km/h. When will they meet?Solution
Time gap = 1.5 hours → Distance = 54 × 1.5 = 81 km
Remaining = 486 – 81 = 405 km
Relative speed = 135 km/h
Time = 405 / 135 = 3 hours
Meeting time = 8:15 a.m. + 3h = 11:15 a.m.
900 Â Â Â 90Â Â Â 18Â Â Â ? Â Â Â Â 2.16Â Â Â Â 1.08
7    12    34    117    ?   2465   14820
...18, 10, 12, 21, ?, 120
What will come in place of the question mark (?) in the following series?
24, 8, 15, ?, 12, 4
What will come in place of the question mark (?) in the following series?
17, 81, 131, 169, 197, ?
What will come in place of the question mark (?) in the following series?
10, 410, ?, 710, 760, 785
226  231   466  ?  5606  28031    Â
4, 4, 5, ? , 248, 1248
97, 75, 108, 64, ?, 53
What will come in place of the question mark (?) in the following series?
15, 16, 25, 50, 99, 180, ?
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