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33 Math Puzzles (with Answers) to Test Your Smarts
From Reader's Digest's Mind Stretchers books, these math puzzles have a bit of everything! Get Reader's Digest's Read Up newsletter for more puzzles, pets, humor, travel, tech and fun facts all ...
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Math puzzle: imagine there’s no zero
Unlike Roman, Maya or Iñupiaq numerals, this isn’t a total reimagining of numbers. Instead, it’s an uncanny parallel universe. Any number without zeros retains its old appearance (1,776 is still 1,776 ...