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What is the greatest common factor of 15 and 20?
The GCF of 15 and 20 is 5.Since 15 = 3x5 and 20 = 2 x 2 x 5, the greatest common factor is 5.One way to approach this is to look at the difference between 15 and 20, which is 5. The greatest common factor of two numbers cannot be larger than the difference between the two numbers. Since both 15 and 20 are divisible by 5, the greatest common factor is 5.Another way to determine the greatest common factor is to find all the factors of the numbers and compare them.The factors of 15 are 1, 3, 5, and 15.The factors of 20 are 1, 2, 4, 5, 10, and 20.The common factors are 1 and 5. Therefore, the greatest common factor is 5.The GCF is 5.Divide each number by prime numbers until it you get to 1.For example, 15 --> 5(3)20 --> 2(10) --> 2(2)(5)Compare the end results for both numbers, find the ones they have in common and multiply them together to get the gcf. In this case, it would only be 5.The GCF is 5.
How do you draw the factor tree of 85?
85 goes to 5 and 17.It can't go anywhere from there855,17
What are common multiples and least common multiples?
All numbers have multiples. Some numbers have some of the same multiples as other numbers. These are known as common multiples. The smallest of these is known as the least common multiple. Common multiples of 3 and 4 include 12, 24, 36 and so on. The LCM of 3 and 4 is 12.
What are the factor pairs for 15?
Oh, dude, factor pairs for 15? Like, let me think for a sec... Alright, so 1 and 15 are a pair, then there's 3 and 5. That's it, man. Like, those are the only pairs you're gonna get for 15. Hope that helps, or whatever.
How many differnet whole numbers are factors of 15?
To find the factors of a number, you first need to split that number into its prime factors. In the case of 15, this produces: 15 = 3x5 The next step is to note that every factor of the number (apart from 1) is the product of any combination of its prime factors. Thus, the factors of 15 are: 1, 3, 5 and 15.
