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Trần Triệu Tân

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320. Adam Saville 7
321. Michael Dixon 7
322. Trần Triệu Tân 7
323. Cường Nguyễn 7
324. Himanshu Shekhar 7
last 3 solved tasks
If b9bb7 - b9cbc = ca6 find number abc. Multiple solutions may exist.
In the following circles, the four outer numbers are used to calculate the number in the middle. Can you figure out the rule to determine what number should replace the question mark in the third circle?
How Many Squares Are There?
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