U.S. common currency is as follows: penny=1 cent. Five pennies=one nickle. Ten pennies=one dime. Two dimes and one nickle or twenty-five pennies =one quarter. Two quarters=one half dollar. Four quarters or two half dollars =one dollar. Paper money comes in one dollar, two dollar, five dollar, fifty dollar and one hundred dollar bills. Printing of large denomination bills--$500, $1000, $10,000 bills and the $1000,000 gold note were discontinued in 1945 due to lack of use, although a few may still be in circulation. Gold coins ceased to be minted when President Roosevelt required all U.S. citizens to turn in gold to the banks in an effort to stem the financial problems of the 1920's. President Ford made ownership of gold by U.S citizens legal in the 1970's after the U.S. went off the gold standard.