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What are HCF of 20 and 30?
To find the HCF of 20 and 30, break them down into their prime factors: 20 = 2x2x5 30 = 2x3x5 The next step is to identify any common prime factors. In this case both numbers have a 2 and a 5 as prime factors. Multiply these together and you get: 2x5 = 10 Therefore the HCF of 20 and 30 is 10.
What is the common factors for 30 and 45?
The factors of 30 are 1, 2, 3, 5, 6, 10, 20, and 30. The factors of 45 are 1, 3, 5, 9 15, and 45. The common factors of 30 and 45 are 1, 3, and 5.
What is the greatest common factor for 45 and 60?
The factors of 45 are 1, 3, 5, 9, 15, and 45. The factors of 60 are 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, and 60. The common factors are 1, 3, 5, and 15. Therefore, the greatest common factor is 15. You can also determine the greatest common factor from the prime factors. The prime factors of 45 are 3, 3, and 5. The prime factors of 60 are 2, 2, 3, and 5. The common prime factors are 3 and 5, so the greatest common factor is 3 x 5 = 15.
What is the largest number that is factor of 20 and 30?
The largest number that is a factor of both 20 and 30 is the greatest common factor (GCF) of the two numbers. To find the GCF, we need to determine the factors of each number. The factors of 20 are 1, 2, 4, 5, 10, and 20, while the factors of 30 are 1, 2, 3, 5, 6, 10, 15, and 30. The largest number that is common to both lists is 10, making it the largest factor of 20 and 30.
What are common factors of 30 and 40?
The common factors of 30 and 40 are 1, 2, 5, 10
