Can you find the rule describing the $n^{\text{th}}$ term of the sequence of square numbers?                              [Page No. 177]

The sequence of square numbers has the explicit formula $t_n = n^2$.

This means that the nth term is obtained by squaring its position number $n$.

For example, $t_5 = 5^2 = 25$.

Similarly, $t_8 = 8^2 = 64$, $t_{10} = 10^2 = 100$.

Thus, the sequence of square numbers is 1, 4, 9, 16, 25, 36, ... and each term is given directly by $t_n = n^2$.