starting with 2,0,0,5 form the sequence 2,0,0,5,7,2,4,8,1 ....(adsbygoogle = window.adsbygoogle || []).push({});

where each successive digit is the unit digit of the sum of the previous 4 ( 2+0+0+5=7, 0+0+5+7=12 , write 2, .. etc.)

does the sequence 4,0,5,3 ever appear ? prove your answer

i have been trying to see some sort of pattern.. but i can't figure out anything

if anyone has any idea how to do it.. or maybe a hint.. i would really appreciate it..

thanks

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# Interesting sequence

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