



 
We have two responses for you Hi Larry, Let's try an experiment. Suppose Lee had started with 5 then he would count
Divide each of the numbers in his sequence by 7 and look at the remainders. Do you see why this happens? Penny
Model Lee's counting by doing the same thing yourself (you may stop earlier!) Write down the numbers you obtain. Find the differences of a few pairs. Notice anything? So which three of the numbers above could come from such a sequence? Good Hunting!  


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