How determine largest reflected number

Question

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.

score 2 · Accepted Answer · answered Jun 30 '11 at 13:11

2

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.

answered Jun 30 '11 at 13:11

Zev Chonoles

129,973

A mirror doesn't flip left and right; see http://physics.stackexchange.com/questions/8227/a-mirror-flips-left-and-right-but-not-up-and-down. – 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

How determine largest reflected number

1 Answers1