Question
A bookshop has a sale promotion for files.
One file costs 1.70.
Buy 3 and get 2 file free.

How many files can Riordan get if he spends $17 on the files?
3 m

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A bookshop has a sale promotion for files.
One file costs 1.70.
Buy 3 and get 2 file free.

How many files can Riordan get if he spends $17 on the files?