Here is a number machine. Input
x 6
7
Output
a) Work out the output when the input is 9
Here is a different number machine.
Input
- 5
Output
When the input is 9, the output is
b) Complete the number machine.

Where are the

The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.