Finding Common Factors Worksheet
A Grade 7 math worksheet focusing on identifying and listing common factors of given numbers.
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Finding Common Factors
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Read each question carefully and follow the instructions to find the common factors.
1. List all the factors for each pair of numbers below.
a) 12 and 18
Factors of 12:
Factors of 18:
b) 20 and 30
Factors of 20:
Factors of 30:
2. Identify the common factors for each pair of numbers.
a) Common factors of 12 and 18:
b) Common factors of 20 and 30:
c) Common factors of 15 and 25:
d) Common factors of 16 and 24:
3. Which of the following is NOT a common factor of 24 and 36?
2
3
8
12
4. Determine if the following statements are true or false.
a) The only common factor of 7 and 11 is 1.
True
False
b) Every number has at least one common factor with another number.
True
False
5. A teacher has 32 pencils and 40 erasers. She wants to divide them equally among her students so that each student receives the same number of pencils and the same number of erasers. What is the greatest number of students she can have in her class?
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