The answer is one, because after you put one book in, the backpack is no longer empty.
almost 10 years ago
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you can shove them in all at once
almost 10 years ago
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@Ethan XD I never even thought of that!
almost 10 years ago
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depends the size of the backpack and the books
almost 10 years ago
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@emraldYE ur question is HOW MANY
almost 10 years ago
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