What is the average of the first five factors of 18?

  What is the probability of drawing two clubs from a well-shuffled pack of 52 cards?
 

A loan taken by a person doubles in value every 5 years. How long will it take for the loan to be repaid?

A goods train runs at the speed of 72 kmph and crosses a 250 m long platform in 26 seconds. What is the length of the goods train? 

For a given arithmetic progression (AP), if the common difference of the terms is x, find the difference between the 17th term and the 9th term.

Out of 10 persons working on a project, 4 are graduates. If 3 are selected, what is the probability that there is at least one graduate among them?

The difference between a two-digit number and the number obtained by interchanging the positions of its digits is 36. What is the difference between the two digits of that number?

  In a race, average speed of total 75 bikes is 35km/hr. The average speed of red bikes is 55 km/hr. If average speed of green bikes is 30km/hr, then how many green bikes are there? 

A bag contains 64 balls of 8 different colors. There are 8 balls of each color (including red). What is the least number of balls one must pick, without looking, to be sure of selecting 3 red balls?

Mr. Mittal invested an amount of Rs. 13,900 divided in two different schemes A and B at the simple interest rate of 14% p.a. and 11% p.a. respectively. If the total amount of simple interest earned in 2 years be Rs. 3508, what was the amount invested in Scheme B?