A banker's discount on $2000 at 10% is equal to a true discount on $3000. If the time and the rate are the same, calculate the time.

The true discount for an amount of $3100, due 6 months hence is $100. Calculate the rate percent of interest.

A shopkeeper sells 10 sweets for $1 and achieves a gain of 30%. How many sweets did he buy for $1?

If Peter's salary is 50% more than Michael's, by what percent is Michael's salary less than Peter's?

If the tax on wooden items is decreased by 30% and the sales increase by 10%, what effect will it have on the company's revenue?

George, Michael and Samuel together give $40,000 to Peter to start a business. George gives $5,000 more than Michael gives, and Michael gives $4,000 more than Samuel gives. Out of a total profit of $10,000 from the business, how much does Michael receive?

The cost of making a table is divided between materials, workers and transporters in the ratio of 5:6:1. If the cost of the table is $312, what will be the material cost of the table?

A piece of equipment, which was calculated to have 3 years of life, was purchased by a company in March 2005 for $80000. After 3 years, the residual value shall be $20000. Calculate the depreciation expenses for 2005, 2006 and 2007 using the straight line depreciation method.

At the end of season sale, a company decided to hike the price of an automobile by 20%. By what percentage should the company decrease the new price in order to restore the original price?

How much will be the percentage of loss on an article if the cost price is $10 and the selling price is $8?

In which depreciation technique does the company generate revenue and also estimate the asset value?