Consider the numbers 3, −5 , $\sqrt{7}$, $2^{−3}$ and 1.75.

Complete the table below, placing a tick () to show which of the number sets, $\mathbb{N}, \mathbb{Q} {\text{ and }} \mathbb{R}$ these numbers belong to. The first row has been completed as an example.

(A1) for $\mathbb{N}$ column correct.

(A2) for $\mathbb{R}$ column correct, award (A1) if one is missing, award (A0) if two or more missing.

(A3) for $\mathbb{Q}$ column correct, award (A2) for two correctly placed and no extra entries, award (A1) for one correctly placed and no extra entries or placed in all entries.     (A6)     (C6)