1. A person has 4 coins each of different denomination. What is the number of different sums of money the person can form (using one or more coins at a time)?

2. A radio when sold at a certain price gives a gain of 20%. What will be the gain percent, if sold for thrice the price?

3. Dinesh travelled 1200 km by air which formed 2/5 of his trip. One third of the whole trip, he travelled by car and the rest of the journey he performed by train. What was the distance travelled by train?

4. The largest copper producing country in the World is

5. Pipe A can fill in 20 minutes and Pipe B in 30 mins and Pipe C can empty the same in 40 mins.If all of them work together, find the time taken to fill the tank

6. The tutor of Alexander the great was

7. The average between a two digit number and the number obtained by interchanging the digits is 9. What is the difference between the two digits of the number?

8. If x=y=2z and xyz=256 then what is the value of x?

9. If the radius of a circle is diminished by 10%, then its area is diminished by:

10. Thirty men take 20 days to complete a job working 9 hours a day. How many hour a day should 40 men work to complete the job?