A Multiplication Based Logic Puzzle

137 and Level 4

137 is a prime number. Factor pairs: 137 = 1 x 137. Its only factors are 1 and 137. Prime factorization: none.

How do we know that 137 is a prime number? The square root of 137 is an irrational number approximately equal to 11.7047. If 137 were not a prime number, then it would be divisible by at least one prime number less than or equal to 11.7047. Since 137 cannot be divided evenly by 2, 3, 5, 7, or 11, we know that 137 is a prime number.

137 is never a clue in the FIND THE FACTORS puzzles.

2014-22 Level 4

Excel file with puzzles and the previous week’s factor solutions: 12 Factors 2014-06-02

2014-22 Level 4 Logic

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