A Multiplication Based Logic Puzzle

107 and Level 6

107 is a prime number. 107 = 1 x 107. Its only factors are 1 and 107. Prime factorization: none.

How do we know that 107 is a prime number? The square root of 107 is an irrational number approximately equal to 10.34. If 107 were not a prime number, then it would be divisible by at least one prime number less than or equal to 10.34. Since 107 cannot be divided evenly by 2, 3, 5, or 7, we know that 107 is a prime number.

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

2014--17 Level 6

This week’s puzzles and last week’s solutions: 10 Factors 2014-04-28

2014-17 Level 6 Logic

 

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