A three-volume encyclopedia stands on a bookshelf, the books in order from left to right. Each book is six centimetres thick, including the covers, which are half a centimetre thick.
A bookmark is placed at the first page of volume one, and another is placed at the last page of volume three. How far apart are the bookmarks?
What do these two words have in common?
It's not as simple as you might think. The word WOUND does not have the same property.
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