Practice Questions

The average marks obtained by 22 candidates in an examination is 50. The average of the first 10 candidates is 44, while that of the last eleven is 60. The marks obtained by the 11th candidate is

Jane and Jill move towards each other from two towns that are 55 miles apart. Jane?s speed is 12 miles per hr and Jill?s speed is 10 miles per hr. After how much time will they be 11 miles apart?

A boat goes 14 km upsteram in 56 minutes. The speed of stream is 2 km/hr. The speed of boat in still water is

Chords AB, BC and CD of a circle subtend angles of 80 degree, 60 degree and 70 degree respectively at the centre O of the circle. Then the acute angle between AC and BD is

A leak in the bottom of a tank can empty it in 6 hr. A pipe fills the tank at 4 litre per minutes. When the tank is full, the inlet is opened, but due to the leak the tank is emptied in 8 hr. What is the capacity of the tank?

In an apartment block there are 10 residents. The number of cars owned by the residents are 15. Four of the residents do not have any car, exactly 3 have one car each and one person has 4 cars. What may be the maximum number of cars owned by any resident?

In an examination, 80 percent marks are required to get scholarship. Abhi got 1005 and failed to get the scholarship by 13 percent of the maximum marks. What was the maximum marks?

The average of 9 numbers is 30. The average of first 5 numbers is 25 and that of last 3 numbers is 35. Whats the 6th number

If two dice are thrown simultaneously, then what is the probability of getting the same number on both dice?