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Prime numbers which come before 25 are = 2, 3, 5, 7, 11, 13, 17, 19, 23, 29 and 31. So, sum = 2 + 3 + 5 + 7 + 11 + 13 + 17 + 19 + 23 + 29 + 31 = 160 Desired average = 160/11
A and B are travelling towards each other with a speed of 30 km/hr and 40 km/hr. They started at same time and A covered 25 km less distance than B befo...
The average speed of a bus is half the speed of a train. The train covers 5200 km in 13 hours. How much distance will the bus cover in 36 minutes?
The tops of two poles of height 60 metres and 35 metres are connected by a rope. If the rope makes an angle with the horizontal whose tangent is 5/9 met...
Before servicing, a car runs at a speed of 28 km/hr while after servicing, it runs at a speed of 56 km/h. After servicing the car covers a certain dista...
The speed of a car is 30% more than that of a bike. Both of them start from a same point. After travelling for 4 hours, the speed of the bike is increas...
Two trains for Mumbai leave Delhi at 6 a.m. and 6:30 a.m. and travel at 100 km/h and 136 km/h respectively. Approx. how many km from Delhi will the two ...
A train travels from station ‘P’ to station ‘Q’ at a constant speed. If its speed was increased by 20 km/h, it would have taken 1 hour less to c...
1322 metres long train crosses a man who is moving in the same direction with a certain speed, in 40 seconds. If the same train can cross a tree in 20 s...
A cheetah can catch a deer running with a speed of 36 km/h and is 45 meters ahead of it, in 12 seconds. Find the time taken by the cheetah to catch a ze...
