Challenge  Keypad puzzle

02132020, 06:00 PM
(This post was last modified: 02132020 06:06 PM by John Keith.)
Post: #3




RE: Challenge  Keypad puzzle
Assuming here that you meant permutations, it seems that the two groups on the left side of the keypad, { 1 2 4 5 } and { 4 5 7 8 } share the same common factor.
However, the two groups on the right hand side, { 2 3 5 6 } and { 5 6 8 9 } do not share the same common factor nor any others. Maybe I am missing something? Another amusing observation: the "almost square" formed by the digits { 0 1 2 } on the lower left (ignoring the decimal point) share the same common factor as the other two groups on the left side. 

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