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The Number Crunching Machine

Put a number at the top of the machine and collect a number at the bottom. What do you get? Which numbers get back to themselves?

Machines

Stage: 2 Challenge Level: Challenge Level:1
Can you work out what is happening as you go through each "box" in this machine?
Some have been left blank for you to invent your own.

wheat-heat-eat-at-a

In these two examples, each box does something different.

Can you work out what it is?

7_12_24_16_8

Try putting some different start numbers in.

Can you predict what they will come out as?