A man purchsed some eggs at 3 for Rs. 16 and sold them at 5 for Rs.36 . Thus, he gained Rs. 168 in all. How many eggs did he purchase ?

A man purchased some eggs at 3 for Rs. 5 and sold them at 5 for Rs. 12. Thus he gained Rs. 143 in all. The number of eggs he bought is

A man purchased a for Rs. 1300 and sold it for Rs. 1380. Find his gain or loss.

A man purchased a bicycle for Rs 1,040 and sold it for Rs 800. His gain per cent is 30%.

A man purchased a box full of pencils at the rate of 7 for Rs. 9 and sold all of them at the rate of 8 for Rs. 12. In this transaction, he gained Rs. 10. How many pencils did did the box contian?