Answer :
Answer:
1. gcf is 4
12: 1,2,3,4,6,12
8: 1,2,4,8
2. gcf is 2
26: 1,2,13,26
16: 1,2,4,8,16
3. gcf is 9
45: 1,3,5,9,15,45
36: 1,2,3,4,6,9,12,18,36
prime number examples 1,3,5,7,11,13
The greatest common factor of
12 and 18 is 4.
26 and 16 is 2.
45 and 36 is 9.
What is greatest common factor?
The GCF(Greatest common factor ) of two or more numbers is the greatest of two or more numbers among all the common factors of the given numbers.
What are factors?
Factors are that numbers can be multiplied together to so that they make another number. Or factors of numbers include all numbers that divide evenly into that number with no remainder.
What is relatively prime?
If the only common factor of two numbers a and b is 1, then a and b are relatively prime numbers.
1. Factors of 12 : 1,2 4 and 12
Factors of 8 : 1, 2, 4 and 8
⇒ Greatest common factor of 12 and 8 is 4.
2. Factors of 26: 1, 2, 13 and 26
Factors of 16: 1, 2, 4, 8, and 16
⇒ Greatest common factor of 26 and 16 is 2.
3. Factors of 45: 1, 3, 5, 9, 15 and 45.
Factors of 36: 1, 2, 3, 4, 6, 9, 12, 18, and 36.
⇒ Greatest common factor of 45 and 36 is 9.
Examples of two relatively prime numbers are 12 and 13, and 4 and 5.
Learn more about the greatest common factors and relatively prime numbers here:
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