45 = 5 \times 9\) and so is not prime. 43 is prime as the only factors of 43 are 1 and 43. The first square number is 1 because \(1 \times 1 = 1\). The second square number is 4 because \(2 \times ...

work backwards from square numbers and cube numbers. If you know that \(15^2 = 225\), then you also know that \(\sqrt{225} = 15\). If you know that \(5^3 = 125\), then you also know that \(\sqrt[3 ...