Mirror Reflex
Here is a pair of mirrors facing each other in the elevator. The letters reflected in the mirror appear to have been written upside down, but the letters reflected next to them are written straight. Then what would the writing on the 100th reflected mirror look like? - hint: find a pattern
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1 solution
When we shape the visible space reflected in the low elevator mirror numerically, 1 appears reflected as shown in the figure in question. Of course, it seems to be upside down. Two is right next to one, so you're standing right there, and three is reflected... The pattern you get here is the opposite of where it was if it moved by odd numbers (1,3,5...), whether it was upside down or straight, or where it was before it moved (if it was straight, it would be upside down and upside down). Nothing changes when you move by even numbers (2,4,6...). Returning to the main point, the letters that appear to be reflected on the 100th start with 1, so you only need to move 99 times. Number 99 is odd, odd is changed, so the letters reflected in the 100th mirror are changed, so stand upright.