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I was trying to determine maximum number from list of given integer in problem 8 here (page 5).

So as you see, there are 5 written numbers on paper, and on the wall there is a hanging mirror. We should determine which row contains the largest integer.

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up vote 2 down vote accepted

The numbers (as we see them in the mirror) are $$8800008$$ $$8008808$$ $$8000088$$ $$8888808$$ $$8008008$$ A mirror flips left and right, so the actual numbers on the paper are $$8000088$$ $$8088008$$ $$8800008$$ $$8088888$$ $$8008008$$ Clearly, the middle one (row number 3) is the biggest.

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♦ thanks very much – dato datuashvili Jun 30 '11 at 13:17
@user3196: No problem, glad to help :) – Zev Chonoles Jun 30 '11 at 13:19
A mirror doesn't flip left and right; see…. – joriki Jun 30 '11 at 13:45
@joriki: That's a good point; I guess the correct description is just that the page is reflected, though this seems kind of circular / definitional. – Zev Chonoles Jun 30 '11 at 14:11

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