Some Specific Problems of Profit and Loss and Marked Price and Discount I

Greetings all,

This morning, I was solving some problems dealing with Profit, Loss, Marked Price and discount. The below 4 problems really confused me. I would appreciate if anyone here guide me........

1. A man sells a bicycle at a gain of 10%. Had he bought it at 10%less, and sold it at $132 less, he would have still gained 10%. Find the cost price.

2. A trader uses 920g instead of 1kg and sells the articles at the marked price which is 15% above the cost price. Find the % profit.

Sincerely,

Abhijit. G.