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Speed of the first train = [120/15] m/sec = 8 m/sec Speed of the second train = [120/30] m/sec = 4 m/sec Speed = (8 + 4) m/sec = 12 m/sec Required time = (120 + 120)/12 sec = 20 sec
8 10 36 216 2592 62208
213, 215, 225, 257, 313, 393
32, 46, 88, 158, 256, 380
6 9 14 22 30 41
...1137, 1138, 1142, 1151, 1185, 1310
120, 146, 198, 276, 372, 510
23, 45, 115, 161, 270, 349
Find the wrong number in the given number series.
263, 133, 201, 505, 1771, 7974
1034, 2364, 4091, 6257, 9030, 12404