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Unicursal Pattern
Is it possible to draw the pattern shown on the left in one
continuous line without lifting your pencil off the paper?
You are not allowed to go over any part of the line twice,
or cross it.
There are two horizontal lines with three dots in them each. You must connect each top dot with all three bottom dots without overlapping or intersecting lines.
It's a rectangle that has two boxes on top of three boxes. The object is to draw a continuous line going through each line segment (there are 16 segments or walls) without crossing one line segment twice.
Three guys paid for the hotel room
$30 ($10 each). While later the hotel's owner realized that there was a mistake, since the room was only $25, and sent a bell-boy to those guys with $5. The bell-boy wasn't clever enough to split $5 evenly between the three men, so he simply gave each man $1 and keep $2. This means that the men paid just $27 ($9 each) and the bell-boy kept $2, what makes total $29. Where is the other dollar?