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  • All numbers equal to or less than 40.
  • Very many:
(One 40 *1 rectangle, two rectangles in 20 ways, three rectangles in a whole bunch of ways , etc)
  • If all the squares are to be used and the rectangles are outlines (not filled) then five
  1. 19 * 3
  2. 17 * 5
  3. 15 * 7
  4. 13 * 9
  5. 11 * 11
  • If all the squares are to make a single unbroken and completely filled rectangle and the orientation of the rectangle does not matter then you can make four:
  1. 40*1
  2. 20*2
  3. 10*4
  4. 8*5
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12y ago

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Q: How many rectangles can you make out of 40 squares?
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