Is 21 a cube number?
Cube Question: Is 21 a cube number?
For 21 to be a cube number the following equation must be true:
n3 = 21 where n is a whole number.
In other words, if n*n*n = 21, then 21 is a cube number.
There are no whole numbers you can set to n to make the equation above 21.
Therefore, we can conclude that 21 is NOT a cube number.
Answer: Is 21 a cube number? = NO
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