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Problem

Find a pattern in this matrix and fill in the missing number.

Type the missing number in the box and press the Submit button.

 

  1 
  1 
  1 
  1 
  1 
  3 
  5 
  7 
  1 
  5 
 13 
 25 
  1 
  7 
 25 

 

The idea of this puzzle is from the book '1000 Play Thinks' by Ivan Moscovich. Workman Publishing, New York.

Click here to return to the puzzle page

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