AMO · 2027 · Grades 2-3 · Self-study SET 23 Question 9

Freddy has 1-dollar, 2-dollar, 5-dollar and 10-dollar coins. How many different ways can he pay exactly 10 dollars using one or more coins? Assume he has enough coins of each value. A way is determined by how many coins of each value are used; changing their order does not create a new way.



Choose one option.