Number Machine Factory
Can you work out the rule for each number machine? Try inserting numbers and see what comes out.

Difficulty 1
Machine 1 Machine 2 Machine 3 Machine 4 Machine 5 Machine 6 Machine 7 Machine 8 Machine 9 Machine 10Difficulty 2
Machine 1 Machine 2 Machine 3 Machine 4 Machine 5 Machine 6 Machine 7 Machine 8 Machine 9 Machine 10Difficulty 3
Machine 1 Machine 2 Machine 3 Machine 4 Machine 5 Machine 6 Machine 7 Machine 8 Machine 9 Machine 10