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Vantoan Nguyen

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517. Shu Bi 2
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519. Vantoan Nguyen 2
520. Lisa Gifford 2
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last 3 solved tasks
Tricky math! Can you solve this? If 11+11=4 and 12+12=9 Then 13+13=?
MATH PUZZLE: Can you replace the question mark with a number?
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