Reversing this gives \(\sqrt{4} = 2\). To find square roots or cube roots, work backwards from square numbers and cube numbers. If you know that \(15^2= 225\), then you also know that \(\sqrt{225} ...

A cube may be written using index notation: 5³ is 5 cubed. 64 is both a perfect square (64 = 8 × 8) and a cube. (64 = 4 × 4 × 4). 8 has four factors, 8, 4, 2 and 1. It is a composite number ...