Question
The speed of a boat in still water is 8 km/hr and the
speed of the stream is 1.5 km/hr. A man rows to a place at a distance of 30.875 km and comes back to the starting point. The total time taken by him is:Solution
Rate downstream = (8 + 1.5) kmph = 9.5 kmph Rate upstream = (8 – 1.5) kmph = 6.5 kmph According to the question, Time = Distance/Speed Hence, Required time = 30.875/9.5 + 30.875/6.5 = 3.25 + 4.75 = 8 hours
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
