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Factors of 18 are 3,3,& 2.
Factors of 21 are 3 & 7
One lot of '3' is common to both so '3' is the HCF.
What else can I help you with?
Which number goes into 21 and 18?
The highest common factor of 21 and 18 is 3
What is the highest common factor of 28 and 21?
it is 7
What is the highest common factor of 21 and 105?
Since 21 is a factor of 105, it is automatically the GCF.
What is the highest common factor of 21 and 41?
The GCF is 1.
What are the GCF 63 and 84?
63 and 84's highest common factor is 21.
Which number goes into 21 and 18?
The highest common factor of 21 and 18 is 3
What is the common factor of 18 36?
You need at least two numbers to find a GCF.
What is the highest common factor of 21 and 14?
7 is the greatest common factor of 14 and 21.
What is the factor of the following 18 21 84 164?
The highest common factor of the given numbers is 1
What is the highest common factor of 273 and 315?
Highest common factor of 273 and 315 is 21.
The highest common factor of 24 and 21?
The highest common factor is 3.
The greater common factor of 18 21?
The greatest common factor of 18 and 21 is 3.
What is greatest common factor of 21 and 24?
The highest common factor of 21 and 24 is 3.
What is the highest common factor of 21 49 63?
The GCF is 7.
What is the greatest common factor of 9 18 and 21?
The Greatest Common Factor of 9, 18, 21: 3
What is the highes common factor of 42 and 63?
The highest common factor is 21
What is th greatest common factor of 12 and 21?
The highest common factor of the numbers 12 and 21 is 3.
