AMC 10 2000 Problem 17

Boris has an incredible coin changing machine. When he puts in a quarter, it returns five nickels; when he puts in a nickel, it returns five pennies; and when he puts in a penny, it returns five quarters. Boris starts with just one penny. Which of the following amounts could Boris have after using the machine repeatedly?

Answer Choices

A. \$ 3.63

B. \$ 5.13

C. \$ 6.30

D. \$ 7.45

E. \$ 9.07