1
Below is a two-staged number machine.
Work out the output when the input is 
1
2
Below is a two-staged number machine.
Work out the output when the input is 
1
3
Below is a two-staged number machine.
Work out the input when the output is 
1
4
Below is a two-staged number machine.
Work out the input when the output is 
1
5
Solve    =
=
2
6
Solve    =
=
2
7
Solve    / =
=
2
8
Solve    / =
=
2
9
Solve    / =
=
2