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The Lucas numbers L_n are given by the recursion L_0=2, L_1=1 and L_n=L_n-1+L_n-2. Find the units digit of L_{100}.

 Nov 17, 2020
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According to your "counting scheme", the 100th Lucas Number is:

 

  7 9207083984 8372253127  = Lucas Number 100

 Nov 17, 2020

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