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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.
What are the factor pairs for 15?
Factor pairs of 15 are: 1x15=15 and 3x5=15. 1, 3, 5, and 15 are the factors of 15.
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.
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.
What is the greatest common multiple of 30 45 and 75?
The greatest common multiple of any set of integers is infinite. If you are looking for LEAST Common Multiple... 30 = 2x3x5 = 2x(3x5) 45 = 3x3x5 = 3x(3x5) 75 = 3x5x5 = 5x(3x5) so the LCM is 2x3x5x3x5 = 450 If you are looking for Greatest Common Factor, that would be 3x5 = 15
What is the greatest common factor for 90 and 165?
90 = 2x3x3x5165 = 3x5x11gcf = 3x5 = 15
What is the greatest common factor of 90 210 and 315?
90 = 2x3x3x5210 = 2x3x5x7315 = 3x3x5x7GCF = 3x5 = 15
What is thr greatest common factor of 15 and 75?
since 15 = 3x5 and 75 = 3x5x5 H.C.F = 5X3 = 15 !
What is the greatest common factor of 7and 15?
To find the greatest common factor, you first need to break the numbers down into their prime factors. In this case: 7 = 7 15 = 3x5 The next step would be to identify any common prime factors. In this case, however, there are no common prime factors. Thus the only prime factor is 1. So the greatest common factor of 7 and 15 is 1.
What is the greatest common divisor of the numbers 15 and 40?
To find the greatest common factor of two numbers, you first need to break them into their prime factors: 15 = 3x5 40 = 2x2x2x5 The next step is to identify any common factors. In this case, the only common factor is 5. Thus, the greatest common divisor of the numbers 15 and 40 is 5.
Name three pairs of numbers that have 5 as their greatest common factor?
5 and 10 10 and 15 15 and 20
What is the greatest common factor of 45 and 165?
Factors of 45 are 1, 3, 5, 9, 15 and 45.Factors of 165 are 1, 3, 5, 11, 15, 33, 55 and 165.It is clear that 15 is the greatest common factor.Alternate method:Expressing each number as the product of prime numbers can simplify the problem easily.Prime factorization of 45 = 3x3x5Prime factorization of 165 = 3x5x11.From the P.F. of both numbers it is clear that 3x5 = 15 is common.So, Greatest common factor is 15.the GCF is 15
Name two composite numbers that have the greatest common factor 1?
Any numbers that don't have common prime factors will do; for example, 23 and 32; 2x3 and 5x7, 3x5 and 2x7, etc.Any two consecutive numbers will have no common factor, for example, 8 and 9 (the first example I gave above), or 100 and 101. However, in the second example, 101 is not a composite number.
What are three pairs of numbers that have the greatest common factor of 5?
GCF or "greatest common factor" is the largest number made of factors common to each of a set of numbers. If all three have only a single 5 as common factor, it is the GCF.15 and 20 (3x5 and 2x2x5) have a GCF of 5.65 and 75 (13x5 and 3x5x5).85 and 100 (17x5 and 2x2x5x5).The trivial answer is "5" and any other multiple of 5.5, 1010, 155, 15
What is the greatest common factor of 30 and 75?
The GCF of 30 and 75 is 15 In order to find the HCF of 30 and 75 you must first express them as the product of their prime factors: 30 = 2x3x5 75 = 3x5x5 The next step is to identify any common factors. In this case both numbers have a 3 and a 5 as factors. Multiply these together to find the HCF: 3x5 = 15 Thus the greatest common factor of 30 and 75 is 15.
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.
