Identify Gcf (Ladder Method) Worksheet

8 problems

The abbreviation of GCF is' Greatest Common Factor’. It is the largest or greatest number among all the common factors of the given numbers. It is referred to using different names. Such as: HCD ( Highest Common Divisor ), HCF ( Highest Common Factor ), GCD ( Greatest Common Divisor). Identifying GCF using the ladder method is very easy. It can be easily executed using the prime factorization. 

Grade 6
Number System

Teaching Identifying GCF Easily 


  • Firstly, express or represent the numbers in the prime factored form or way. 
  • Secondly, identify the GCF. 
  • The highest common factor between the numbers is the GCF of the two or more than two numbers. 


Let us take an example mentioned below to understand more about identifying GCF. 

Example 1: What is the GCF of 60 and 90. 


Step 1: Find the factors of 60 and 90. 

60 = 2, 3, 5 and 2. 

90 = 2, 3, 5 and 3. 


Here, the GCF is 30 ( 2 * 3 * 5). 

Why Should You Use a Identify GCF (ladder method) Worksheet for your Students? 


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