This task is about using a rule to find numbers, and finding the rule from given numbers.
Three numbers go into each machine and come out changed by a rule. For example:
a)  Use the rules below to find the three numbers coming out of each machine. Write the numbers that come out of each machine.  
i)  
ii)  
iii) 


b)  Work out the rule for each of the machines below and write it on the machine.  
i)  
ii) 