2. It is said that Albert Einstein used to take great delight inbaffling friends with the puzzle below: First, write the number1089 on a piece of paper, fold it, and hand it to a friend forsafekeeping. What you wrote down is not to be read until you havecompleted your amazing mental feat. Next, ask your friend to writedown any three-digit number, emphasizing that the first and lastdigits must differ by at least two. Close your eyes or turn yourback while this is being done. Better still, have someone blindfoldyou. After your friend has written down the three-digit number, askhim to
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