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McNuggets

Submitted by Frances from Saratoga, 12/31/2000. Original answer and this article by Allen Stenger.

Chicken McNuggets can be purchased in quantities of 6, 9, and 20 pieces. You can buy exactly 15 pieces by purchasing a 6 and a 9, but you can't buy exactly 10 McNuggets. What is the largest number of McNuggets that can NOT be purchased?

Need a hint? Click here.

Click here for the complete solution.


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