Profit and Loss - General Questions

A man sold an article for Rs. 1,216 at a loss of 20%. What was the cost price?

A dishonest dealer professes to sell his goods at cost price but uses a weight of 920 g for a kilogram. What is his gain percent?

A man sold an article for Rs. 918 at a loss of 10%. What was the cost price?

A man sold an article for Rs. 944 at a loss of 20%. What was the cost price?

A man sold an article for Rs. 288 at a loss of 20%. What was the cost price?