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The number is 18.
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∙ 7y ago
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Why is 18 the greatest common factor of 72 and 90?
Because 18 is the largest number that divides evenly into both 72 and 90.
Is 18 a divisor of 18 and why?
Six is a divisor of 18 because it divides evenly into 18. Another name for divisor is 'factor'.
What is the largest whole number that divides exactly into 18 and 20?
The number is 2.
Why is the greatest common factor of 126 and 360 18?
GCF(126, 360) = 18 because 18 divides into both 126 and 360 without remainder (so it is a common factor) and no other number greater than 18 has that property (so it is the greatest such number).
How is 6 a divisor of 18?
6 divides evenly into 18 with no remainder.
Why is 18 a factor of 54?
Because 18 divides evenly into 54 with no remainder.
What does 18 divide into?
18 divides evenly into an infinite number of integers. The pattern starts with: 18, 36, 54, 72, 90, 108, 126, 144 . . . to infinity.
What is your mistake if you said that the gcf of 36 and 72 is 18?
The mistake is that there is a greater common factor than 18. It's 36. 36 divides 36 evenly. 36 divides 72 evenly.
How is 18 the greatest common factor of 90 and 108?
18 is the largest number that can divide into both 90 and 108 evenly.
Why is the gcf of 18 and 36 18?
Because it's the largest number that can go into both of those numbers evenly with no remainder.
What is the GCF of 36 24 18?
Find the factors of all three numbers and then find the largest number that is in each list: i.e. the factors of 18 are 1, 2, 3, 6, 9, 18. So for example, to find the greatest common factor of 21, 28 and 42, find the factors of each: Factors of 21 are 1,3,7,21 Factors of 28 are 1,2,4,7,14,28 Factors of 42 are 1,2,3,6,7,14,21,42 The highest number that is in all three lists is 7. Therefore, 7 is the greatest common factor. Note: A factor is a number that divides evenly into the number. So, 2 divides evenly into 8 so 2 is a factor of 8. 3 divides evenly into 9 so 3 is a factor of 9, etc.
Can the GCF of 18 and 36 be greaterthan18?
No. A factor is a number that divides into it evenly. No factor of 18 can be bigger than 18, so there can be no COMMON factor between 18 and 36 bigger than 18. The GCF here is actually 18.■
