Can you paint every number from 1 to 8 with two colours, such that there are no distinct numbers $a, b, c$ of the same colour with $a+b=c$? For example, you cannot have 2, 3 and 5 of the same colour since $2+3=5$.
Good luck!
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asked Oct 18, 2019 at 10:47
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1 Answer
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How about this
Red - $\{1,2,4,8\}$
Blue - $\{3,5,6,7\}$
answered Oct 18, 2019 at 11:04