## How Many Animals?

There are only two numbers that can be factorised under the constraints to
give either one or more than one rabbit. These are:

- 24 = 1 × 3 × 8 = 1 × 4 ×
6 = 2 × 3 × 4
- 30 = 1 × 5 × 6 = 2 × 3 × 5

Since knowing whether there is more than one rabbit did not solve the
problem, it follows that there is only one rabbit, and Mandy is 24.

Mandy then gave a final clue: “It’s the combination without a
prime number in.”