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Serial numbers...but!


Go to solution Solved by plainglazed,

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dgreening and I have noticed the same thing:

reverse the digits, and observe deltas

47, (-4) 43, (-2) 41, (-4) 37, (-6) 31, (-2) 29, (-6), 23, 

I extrapolated -4,-2,-4, -6, -2, -6 with -8,-2,-8 yielding (-8) 15 as "51", (-2) 13 as "31", (-8) 05 as "50

dgreening extrapolated -4, -2, -4, -6, -2, -6  with -4, -2, -4 yielding (-4) 19 as "91", (-2) 17 as "71", (-4) 13 as "31"

We had different ways of dealing with the change from -4 to -6.

 

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