Question
Two boats X and Y start towards each other from two
places, 140 km apart. Speed of the boat X and Y in still water are 13km/hr and 15km/hr respectively. If X proceeds down and Y up the stream, they will meet after.Solution
Let the speed of the stream be x km/hr and both the boats meet after t hours According to the question, ⇒ (13 + x) t + (15 – x) t = 140 ⇒ 13t + 15t = 140 ⇒ 28t = 140 ⇒ t = 140/28 = 5 hours
3 15 35 63 99 ?
15Â Â Â Â Â Â Â Â Â Â Â Â 13 Â Â Â Â Â Â Â Â 28 Â Â Â Â Â Â Â Â Â Â Â Â Â Â 24 Â Â Â Â Â Â Â Â Â Â Â Â Â Â 54 Â Â Â Â Â Â Â Â 52
...6Â Â Â Â Â Â Â Â Â Â Â Â Â 7Â Â Â Â Â Â Â Â Â Â Â Â Â 15Â Â Â Â Â Â Â Â Â Â 46Â Â Â Â Â Â Â Â Â Â 185Â Â Â Â Â Â Â Â ?
...Study the given pattern carefully and select the number that can replace the question mark (?) in it.
4 7 6
15 ? 21
44 68 60
36, 49, 23, 62, ?, 75
6 3.5 2.5 ? 8.5 23.75
...49Â Â Â 84Â Â Â 119Â Â Â 154Â Â Â 189Â Â Â ?
A series is 4, 5, 17, 88, 620, 5585
If another series a, b, 23, d, e, f follows the same pattern as the given number series, then find the approx...
48Â Â Â Â 61 Â Â Â Â 76 Â Â Â Â 94Â Â Â Â 116 Â Â Â Â Â ?
3 12 48 192 768 ?
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