Question
A boat can travel 26 km downstream in 30 min. The ratio
of the speed of the boat in still water to the speed of the stream is 8: 5. How much time will the boat take to cover 22 km upstream?Solution
Speed of downstream = D/T = 26 × (60/30) = 52 km/hr The ratio of the speed of the boat in still water to the speed of the stream = 8: 5 (8x, 5x) => 13x = 52 => x = 4 Speed of upstream = 8x – 5x = 3x = 12 km/hr Distance = 22 km Time = D/S = 22/12 = 1(5/6) hr
3. 8, 15, 24, 34, 48, 63
Select the wrong term in the series.
44, 47, 41, 50, 38, 53, 40
Select the wrong term in the series.
10, 19, 23, 52, 61, 133, 149
Find the wrong number in the following number series:
2500, 1000, 400, 160, 60
A series is given with one wrong term. Select the wrong number from the given series.
17, 29, 43, 59, 77, 97, 112
8, 20, 48, 108, 232, 482
In this question, one term in the number series is wrong. Find out the wrong term.
130, 135, 143, 154, 168, 183, 205
Find the wrong number.
17, 25, 37, 47, 65, 81
Arrange the following words in a logical and meaningful order.
1. Monkey
2. Elephant
3. Rat
4. Fly
5. Lion
Select the number from among the given options that is wrong in the following series.
22, 30, 46, 78, 146, 270
