A person bought pens at 25 for a rupee and sold at 15 for a rupee. What is his profit percentage?

The average runs conceded by a bowler in 5 matches is 45 and 15.75 in other 4 matches. What is the average runs conceded by the bowler in 9 matches?

If A : B = 2 : 5, B : C = 4 : 3 and C : D = 2 : 1, then what is value of A : C : D?

The marked price of an article is 20% more than its cost price. If 5% discount is given on the marked price, then what is the profit percentage?

If the radius of the cylinder is increased by 25%, then by how much percent the height must be reduced, so that the volume of the cylinder remains same?

A can do a work in 8 days, B can do the same work in 10 days and C can do the same work in 12 days. If all three of them do the same work together and they are paid Rs 7400, then what is the share (in Rs) of B?

By which least number should 5000 be divided so that it becomes a perfect square?

Which of the following country is not a member of SAARC?