Delhi Police Constable 8th Dec 2017 Shift-2

The income of C is 30% more than the income of B and the income of B is 30% more than the income of A. The income of C is how much percent more than the income of A?

If x : y = 4 : 3 and y : z = 7 : 9, then what is x : z?

Average of 50 numbers was calculated as 18. Three numbers 18, 32 and 65 were wrongly taken as 25, 29 and 56. What will be the correct average?

A man borrowed Rs 8000 at compound interest at the rate of 10% per annum. If the interest is compounded half yearly, then what will be the amount (in Rs) to be paid after 1.5 year?

If a woman purchases 14 apples for Rs 13 and sells 13 apples for Rs 14, then what will be her profit or loss percentage ?

Pankaj purchases a watch for Rs 900 and marks its marked price as such a way that after allowing a discount of 30%, he earns a profit of 40%. What is the marked price (in Rs) of the watch?

The length of the diagonal of a square is 7 cm. Whats the area (in $$cm^2$$) of the square?

A train takes 30 seconds to pass through a platform 320 meter long and 25 seconds to pass another platform 230 meter long. What is the length (in meters) of the train ?

Rahul is 50 years old and Mohit is 70 years old. How many years ago the ratio of their ages was 1 : 2?

Anuj's efficiency is 150% of Vinod's efficiency. If Anuj can complete a piece of work in 10 days, then how much time (in hours) will they both take to complete the same work?