Delhi Police Constable 5th Dec 2017 Shift-1

If a number Ais 30%less than another number B and B is 20% more than 150, then what is the value of A?

If $$a=(\frac{5}{4})b$$ and $$b = (\frac{2}{10})c$$ then what is $$a : b : c$$?

The average age of 11 players and their coach is 33 years. The average age of first 5 players is 29 years and the average age of other 6 players is 30
years. Whatis the age (in years) of the coach?

What will be the difference (in Rs) between the compound interest and simple interest on Rs 8000 for 2 years at the rate of 2.5% per annum?

If 40 chairs are bought for Rs 10000, then how many chairs must be sold for Rs 10000 so as to gain 60%?

Piyush marks the price of his article 30% more than its costprice. If he sells the article for Rs 780 after allowing a discount of 20%, then what will be the cost price (in Rs) of the article?

What will be the ratio of the area of square to the area of circle inscribed in it?

A man travelled four equal distances of 3 km at speeds of 10, 20, 30 and 40 $$\frac{km}{hr}$$respectively. What is his average speed (in $$\frac{km}{hr}$$)?

P started a business with Rs 80000 and after some months Q joined with Rs 60000.If the profit at the end of the year was divided in the ratio 2 : 1, then after how many months did Q joined the business?

F and M together can do a piece of workin 8 days. F alone can do the same work in 12 days. In how many days can M alone do the same work?