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The mistakes behind most wrong answers
A wrong answer in what the leftover means is rarely random. These are the ones that come up most often, each on a real problem — worth knowing before you mark a sheet, because the fix for each is different.
Owen is packing 50 apples into boxes. Each box holds 3. How many boxes are needed to fit them all?
The answer is 17. A child who answers 2 probably gave the leftover instead of how many groups.
Ava is packing 43 blocks into boxes. Each box holds 3. How many boxes are needed to fit them all?
The answer is 15. A child who answers 16 probably counted one group too many or too few.
Noah is packing 27 shells into boxes. Each box holds 6. How many boxes end up full?
The answer is 4. A child who answers 5 probably counted a part-filled group as a full one.
Liam is packing 72 pencils into boxes. Each box holds 5. How many boxes are needed to fit them all?
The answer is 15. A child who answers 14 probably forgot the leftover still needed somewhere to go.
In the app, every wrong answer is matched against mistakes like these, and the weekly email tells you which one your child keeps making — in those words, not as a percentage.