## 1. A man has Rs. 480 in the denominations of one-rupee notes, five-rupee notes and ten-rupee notes. The number of notes of each denomination is equal. What is the total number of notes that he has ?

## 2. There are two examinations rooms A and B. If 10 students are sent from A to B, then the number of students in each room is the same. If 20 candidates are sent from B to A, then the number of students in A is double the number of students in B. The number of students in room A is:

## 3. The price of 10 chairs is equal to that of 4 tables. The price of 15 chairs and 2 tables together is Rs. 4000. The total price of 12 chairs and 3 tables is:

## 4. If *a* - *b* = 3 and *a*^{2} + *b*^{2} = 29, find the value of *ab.*

*a*-

*b*= 3 and

*a*

^{2}+

*b*

^{2}= 29, find the value of

*ab.*