Find the selling price of an article when the cost price is $50 and the gain is 20%?

Calculate the composite depreciation rate from the following table:

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?

Calculate the compound interest compounded half yearly for 1 year on $10000 at an interest rate of 6% per annum.

Find out the missing number in the following: 9/5 : 7/4 : : 3/5 : ______

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?