| Fill in the box with an appropriate number in place of the question mark (?). |
| \[21-9=3\times \] |
| A | 3 | 2 | 1 | 0 |
| B | 8 | 7 | 6 | 5 |
| Fill in the box with an appropriate number. |
| \[13+9=\times 1\] |
How many faces are there?
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