Why do this
problem?
This problem is suitable for learners who need a
challenge when working with square numbers.
Key questions
Have you made a list of squares of the relevant numbers?
Have you remembered that $1$ is a square number?
What is the square root of that number?
Possible extension
Learners who need even more of a challenge could try
Cycling squares.
Possible support
Suggest making a list of squares of the relevant numbers,
remembering that $1$ is a square number.