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28
Li Yinyin
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What is the factor tree of 28?
28 4 x 7 2x2 7 = 2x2x7
Prime factors of 196?
196/2=98 98/2=49 49/7=7 =2x2x7
What is the GCF of 28 20 and 40?
To find the GCF, you first need to break the numbers down into their prime factors: 28 = 2x2x7 20 = 2x2x5 40 = 2x2x2x5 The next step is to find any common prime factors. In this case, all three numbers have two 2s as prime factors. Multiply these and you get 4. Therefore the GCF of 28, 20 and 40 is 4.
What is the greatest common factor of 12 28 and 40?
The greatest common factor of 12, 28, and 40 is 4 To find the greatest common factor of numbers, you first need to split these numbers into their prime factors: 12 = 2x2x3 28 = 2x2x7 40 = 2x2x2x2x5 You then need to find which prime factors are shared between the numbers. In this case, each of the numbers uses two 2s, but no other numbers are common between them. So to find the GCF we simply multiply two 2s: 2x2=4 Thus the GCF of 12, 28 and 40 is 4.
How do you find the factors and prime factors of a number?
A prime number is a whole number greater than 1 that is divisible by only itself and 1. So, for example, 5 is a prime number because it is only divisible by 1 and 5, but 6 is not a prime number, because it is divisible by 1, 2, 3 and 6.One number is a factor of another if it can evenly divide into it. So, for example, 6 is a factor of 18, since 18/6 is 3.The prime factors of a number are all of the factors of that number that are prime numbers. So, to find the prime factors of 28, first list all of the numbers that are factors of 28. The factors of 28 are 1, 2, 4, 7, 14, and 28. Then write those factors that are prime: 2 and 7.The prime factorization of a number is a little different. The prime factorization of a number is a unique set of prime numbers that multiply together to get the given number. So, the prime factorization of 28 is 2x2x7, because 2x2x7=28.To find the prime factorization of a number, start by writing the number as a product of any pair of non-trivial factors. (So, any factors other than 1 and the number.) Then look at each of these numbers. If the number is prime, then it will be in the prime factorization of the given number. If it is not prime, write it as the product of any of its non-trivial factors. Continue until all numbers are prime.For example, let's find the prime factorization of 28. We can write 28 as the product of the factors 4 and 7. Seven is a prime number, so it will be in the prime factorization of 28. Four, however is not a prime number, so we will write it as 2x2. Since 2 is a prime number, we don't have to "break down" these 2's any more. So the prime factorization of 28 is 2x2x7, or 7x2x2, or 2x7x2--the order of the prime numbers doesn't matter, but we usually write them from smallest to largest.Can you find the prime factorization of 24? The answer is 2x2x2x3.You only need to check the for factors less than (or equal to) the square root of the number. Also, you only need to check for prime factors - once you've got those, you can get the rest easily (if you want to).Example: 1524Try 2:1524 / 2 = 762Try 2 again:762 / 2 = 381Try 2 again:It's not a factor. Move on to the next prime.Try 3:381 / 3 = 127Try 3 again:Not a factor.Try 5:Not a factor.Try 7:Not a factor.Try 11:Not a factor.The next prime is 13. But we don't need to try 13, because 13 > sqrt(127). This means that if 13 had been a factor (say 13x=127), then x would have been a smaller factor of 127, and we would have removed it by now. Similarly, you don't need to try 17, or 19, or any more prime numbers. 127 is prime.Conclusion: The prime factorisation of 1524 is 1524 = 2 * 2 * 3 * 127.
Prime factorization of 28 is?
2x2x7
What is 28 factored into prime numbers?
28 = 2x2x7
What is the factorization for 140?
The process: 70x2 35x2 5x7 The answer is 2x2x7.
How do you do a factor tree with the number 28?
28 4 7 2x2x7
Is the prime factorization of 28 4x7?
No. The prime factorization of 28 is 2x2x7.
What is the factor tree of 28?
28 4 x 7 2x2 7 = 2x2x7
What is the prime factorization for the number 28?
28 = 22 x 7
What are the prime factorization for 28?
prime factorizations:2x2x7
Prime factors of 196?
196/2=98 98/2=49 49/7=7 =2x2x7
How do you make a factor tree out of 28?
28 = 22x7, or 2x2x7^4 7^2 2
What is the greatest common factor of 28 and32?
Prime factor each number. Circle all the prime common factors then, multiply them 28=2x2x7 32=2x2x2x2x2 GCF=2x2=4
How do you find the least common multiple of 28 and 60?
Do a prime factorization of both... 28 = 2x2x7 60 = 2x2x3x5 Use the common factor only once and the other factors (2x2) is common to both ... use this only once ( 2x2)x7x3x5 = 420
