June 12, 2011
Answer: American Idol and Eric Idle
NPR Sunday Puzzle for June 12Submit your answer to NPR for a chance to be on next week's broadcast and be sure to visit Jenny's Noodle next Sunday to see the correct answer!
This Hat Rack Puzzle by Sam Lloyd was published 100 years ago in Woman's Home Companion:
A hat room contains a wall with 49 pegs, arranged in a 7-by-7 square. The hat clerk has 20 hats that are to be hung on 20 different pegs. How many lines, containing four hats in a straight line, is it possible to produce?
A line can go in any direction: horizontally, vertically or obliquely. To explain your answer, number the pegs in order, from 1 in the upper left corner to 49 in the lower right corner; list which pegs you put the 20 hats on, and give the total number of lines containing four hats in a row.
|ShareThis | Posted June 12, 2011 at 8:16 AM|
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