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# Meaning of $$\overline{xyz}$$

Can anybody tell me what $$\overline{xyz}$$ means? I came across this symbol in the sum in the following link: https://brilliant.org/problems/the-lightning-scar/?ref_id=1156763

Note by Aniruddha Bhattacharjee
1 year, 3 months ago

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It is the concatenation of the values of x,y and z respectively. For example of x=1,y=2 and z=3 then $$\overline{xyz}=123$$ · 1 year, 3 months ago