Bander buys a pencil set and gives $20 to the shopkeeper, the shopkeeper returns $16 to him. What is the cost of the pencil set?
Sumeet purchased a book for ₹ 24.75 and a pencil box. He gave ₹100 to the shopkeeper and the shopkeeper returned ₹32.75 to him. Find the cost of the pencil box.
By selling 100 pencils a shopkeeper gains the S.P. of 20 pencils. His gain percent is