Factors of 20 Solved Examples
Que 1: What is the common factor of 20 and 28?
Ans 1: To find the common factor of 20 and 28, we first need to find the factors of both numbers individually;
Factors of 20 are = 1, 2, 4, 5, 10, and 20.
Factors of 28 are = 1, 2, 4, 7, 14 and 28.
Now, we need to check the common factors between both numbers;
The common factors of 20 and 28 are 1, 2, and 4.
Que 2: Find the greatest common factor of 8 and 20.
Ans 2: The factors of 8 are = 1, 2, 4, and 8.
Factors of 20 are = 1, 2, 4, 5, 10, and 20.
So, the common factors of 8 and 20 are 1, 2, and 4.
Therefore, 4 is the highest common factor of 8 and 20.
Que 3: Find the common factor of 20 and 30.
Ans 3: Factors of 20 are = 1, 2, 4, 5, 10 and 20.
Factors of 30 are = 1, 2, 3, 5, 6, 10, 15 and 30.
So, the common factors of 20 and 30 are 1, 2, 5, and 10.
Que 4: Find the common factor of 20 and 16.
Ans 4: Factors of 20 are = 1, 2, 4, 5, 10 and 20.
Factors of 16 are = 1, 2, 4, 8 and 16.
So, the common factors of 16 and 20 are 1, 2 and 4.
Que 5: Find the highest common factor of 18 and 20.
Ans 5: Factors of 20 are = 1, 2, 4, 5, 10 and 20.
Factors of 18 are = 1, 2, 3, 6, 9 and 18.
Common factors of 20 and 18 are 1, and 2.
So, the highest common factor of 18 and 20 is 2.
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