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Greatest Common Factor Worksheet and Solutions

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More Lessons for Arithmetic
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Objective: I can find the greatest common factor.

One way to find the greatest common factor (GCF) is

Step 1: List the factors of given numbers.

Step 2: Find the factors common to the given numbers.

Step 3: Select the greatest common factor.

Read the lesson on greatest common factor if you need to learn how to find the greatest common factor.

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
Find the greatest common factors for the following numbers:

a) 12, 18 and 24

b) 30, 40 and 60

c) 32, 48 and 112

d) 27, 72 and 126

e) 35, 84 and 105

f) 22, 77 and 143

g) 64, 96 and 112

h) 63, 84 and 126

i) 160, 96 and 192

j) 85, 255 and 153

k) 78, 65 and 91

l) 22, 143 and 63

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