From 2004 to 2005. the sales of a book decreased by 80%. If the sales in 2006 were the same as in 2004, by what percent did they increase from 2005 to 2006 ?

The average of 10 numbers is ---10. If the sum of 6 of them is 100, then what is the average of the other 4 nu...

If x% of y is 10, then what is y ?

If the product of 4 consecutive integers is equal to one of them , then what is the largest possible value of...

The average daily income of Mr. A and Mr. B is Tk. 350 , of Mr. B and Mr. C is Tk. 365 and of Mr. A and Mr. c...

A retailer buys a Panjabi and a Fatua jointly at Tk. 500. If he sells the Fatua at 10% profit and the panjabi...

Mr. Jamal employed 50 workers to finish a work within 30 days . After 20 days he found out that only 50% work...