Is 21500 a perfect cube?
Answer (1)
20th Jan, 2023
A perfect cube is a number whose cuber root is a whole number. When we find the cube root of 21500 we get the following.
\begin{aligned}
&\sqrt[3]{21500}=27.806
\end{aligned}
As we can see the cube root of 21500 is not a whole number, which means it is not a perfect cube.
As a rule of thumb, if a number has less than three zeros in the ones, tens and hundreds place, it is not a perfect cube. 21500 has only two zeros. Hence, not a perfect cube.
Examples of perfect cubes can be 1000, 8000, 27000 etc.
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