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Make 24 from the numbers 1, 3, 4, and 6. You can only use basic arithmetic operations such as addition, subtraction, multiplication, and division.
Describe the classification scheme.
A EF HI KLMN T VWXYZ
BCD G J OPQRS U
1 11 21 1211 111221
1, 3, 5, 15, 17, 51, 53, …
Using bags with different money amounts, you want a combination of them to add up to every dollar possibility between $1 and $67, with cents not included. What is the minimum number of bags you need?