A wristwatch was sold at 10% profit. If the cost was 15% less and the selling price was Tk. 20 less, then the trader would have made a profit of 20%. What was the cost of the wristwatch?

In a book store, the sales of a book decreased by 80% from 2007 to 2008. If the sales in 2009 were the same as...

Robin has 4 times as many marbles as Azad has and 5 times as many as Kalam has. If Kalam has more than 40 marb...

If x is a positive number, 500% of x is what percent of 500x?

How much longer is required to drive one mile at 60 miles/hour than at 100 miles/hour?

During a sale, a salesperson was putting a new price tag on each item. On one shirt, he accidentally raised th...

Tk. 9,000 is divided among Abu, Rabu, Babu and Habu by 1 : 2 : 3 : 4 ratio. How much money do Rabu and Habu ha...