Highest Common Factor

• Identify the largest number common to ALL the numbers
• 
  
  Step 1: Find all the factors of each number
  
  Factors of 10
  1 x 10
  2 x 5
  Factors of 25
  1 x 25
  5 x 5
  
  
  Step 2: Identify the largest number common to ALL the numbers
  
  Factors of 10
  1 x 10
  2 x 5
  Factors of 25
  1 x 25
  5 x 5
  
  
  Although 10 and 25 are obviously larger factors than 5, they are not COMMON to both numbers.
  
  Answer: HCF of 10 and 25 = 5
  
  This skill is a must to master before venturing into comparing and ordering fractions with different sized denominators.
  
  
  
  
  
  
  
  I hope you enjoy this section of K6Math.com
  
  To practice this skill print off some of the Highest Common Factor worksheets at our printable fraction worksheets section. Move from this Highest Common Factor page to printable math worksheets home page or K6Math numbers section.
  
  
  

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