A Multiplication Based Logic Puzzle

193 and Level 2

193 is a prime number.
Factor pairs: 193 = 1 x 193
Factors of 193: 1, 193
Prime factorization: none

How do we know that 193 is a prime number? The square root of 193 is an irrational number approximately equal to 13.89. If 193 were not a prime number, then it would be divisible by at least one prime number less than or equal to 13.89. Since 193 cannot be divided evenly by 2, 3, 5, 7, 11, or 13, we know that 193 is a prime number.

2014-31 Level 2

Excel file of puzzles and previous week’s factor solutions: 10 Factors 2014-08-04

2014-31 Level 2 Factors

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