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Australian AMC 2009 - Junior Question 4

AMC AUSTRALIA · Australian AMC 2009 - Junior

Question 4

I have \$10 in 10-cent coins, \$10 in 20-cent coins and \$10 in 50-cent coins. How many coins do I have?
  1. 80
  2. 650
  3. 90
  4. 200
  5. 170