What goes up and down, but still remains in the same place?
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• • • • • •
• • • • • •
• • • • • •
Stairs!
Are you feeling smart? You'd better be, because this book is filled with the most mind-boggling brain teasers... More
What goes up and down, but still remains in the same place?
• • • • • •
• • • • • •
• • • • • •
• • • • • •
• • • • • •
Stairs!