A Multiplication Based Logic Puzzle

209 and Level 3

2-0+9=11 so 209 is divisible by 11.

  • 209 is a composite number.
  • Prime factorization: 209 = 11 x 19
  • The exponents in the prime factorization are 1 and 1. Adding one to each and multiplying we get (1 + 1)(1 + 1) = 2 x 2 = 4. Therefore 209 has exactly 4 factors.
  • Factors of 209: 1, 11, 19, 209
  • Factor pairs: 209 = 1 x 209 or 11 x 19
  • 209 has no square factors that allow its square root to be simplified. √209 ≈ 14.456832

——————————————————————

 2014-33 Level 3

Excel file of puzzles and previous week’s factor solutions: 10 Factors 2014-08-18

A Logical Approach to FIND THE FACTORS: Find the column or row with two clues and find their common factor. Write the corresponding factors in the factor column (1st column) and factor row (top row).  Because this is a level three puzzle, you have now written a factor at the top of the factor column. Continue to work from the top of the factor column to the bottom, finding factors and filling in the factor column and the factor row one cell at a time as you go.

2014-33 Level 3 Factors

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

Tag Cloud