Question
42, 61, 78, 93, 102,
109 Find the wrong number in the given number series.Solution
ATQ, The series is Number + consecutive prime numbers in descending order starting from 19 42 +19=61 61 + 17 = 78 78+13=91 91 + 11 = 102 102 +7 = 109 Therefore, 91 should come in place of 93.
A boat covers 36 km downstream in 3 hours and 24 km upstream in 4 hours. Find the speed of the boat in still water and the speed of the stream.
A man can row at 3 kmph in still water. If the velocity of current is 2 kmph and it takes him 6 hour to row to a place and come back, how far is the place?
A person rows x km downstream and the same distance upstream in 10 hours. He can row 2x km downstream in 5 hours. What is the time taken to row x km ups...
A boat travels 42 km against the current and 72 km with the current in a total time of 8 hours. Additionally, it covers a distance of 56 km in still wat...
The ratio of the speed of boat ‘A’ in still water, the speed of boat ‘B’ in still water and the speed of the current is 8:6:2, respectively. If ...
Speed of stream 'P' is 3 km/h more than speed of stream 'Q'. Sum of upstream speed of a boat in 'P' and its downstream speed in 'Q' is 37 km/h. Time ta...
A man rows a boat a certain distance downstream in 9 hours, while it takes 18 hours to row the same distance upstream. How many hours will it take him t...
The ratio of downstream speed to upstream speed of a boat is 5:3. If the boat can cover 160 km in still water in 10 hours, then find the difference betw...
Speed of a ship is 6 m/s, which increases by 2 m/s after every 5 minutes. It travels upstream for 15 minutes and then travels downstream for 15 minutes....
A man takes 2.2 times as long to row a distance upstream as to row the same distance downstream. If he can row 66 km downstream in 2 hours, what is the ...
Relevant for Exams:
