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Let the speed of boat in still water be x km/hr and that of stream be y km/hr. ATQ, ⇒ (x + y) – (x – y) = 6 ⇒ y = 3 km/hr ⇒ x = 3 × 8/3 = 8 km/hr Required time = [33/(8+3)] + [25/(8−3)] = 8 hr
1595, 1083, 740, 524, 399, ?
17 21 51 169 701 ?
17, 19, 41, 127, 513, ?
What will be come in place of (?) in the given number series.
2, 3, 5, 7, 11, ?, 17
116, 118, 124, 136, 156, ?
6400, 1600, ?, 80, 16, 4
4 10 ? 62.5 156.25 390.625
...51 26 27 ? 86 217.5
120 124 151 167 292 ?
4.8, 14, 62, ?, 1516, 7578