Amount received after depositing Rs 800 for a period of 3 years at the rate of 12% per annum is Rs 896.

Sushma sold her watch for Rs 3320 at a gain of Rs 320. For earning a gain of 10% she should have sold the watch for Rs 3300.

Interest on Rs 1200 for years at the rate of 15% per annum is Rs 180.

Rs 6400 were lent to Feroz and Rashmi at 15% per annum for and 5 years respectively. The difference in the interest paid by them is Rs 150.

A vendor purchased 720 lemons at Rs 120 per hundred.10% of the lemons were found rotten which he sold at Rs 50 per hundred. If he sells the remaining lemons at Rs 125 per hundred, then his profit will be 16%.