what is the cube of 21?

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• A 63
• B 441
• C 9261
• D 21

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Answer: C. 9261

The cube of 21 is 21 x 21 x 21. First 21 x 21 = 441, then 441 x 21 = 8820 + 441 = 9261. 441 is only the square.

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