To determine which box size is NOT a viable option for packaging 36 cookies, we need to check if each box size is a factor of 36.
- 4 cookies per box: \(36 \div 4 = 9\) (viable option)
- 6 cookies per box: \(36 \div 6 = 6\) (viable option)
- 9 cookies per box: \(36 \div 9 = 4\) (viable option)
- 10 cookies per box: \(36 \div 10 = 3.6\) (not a viable option, as it doesn't result in a whole number)
Therefore, the box size that is NOT a viable option is 10 cookies per box.
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