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What is the difference between finding the least common multiple and finding the greatest common factor of two numbers?
The GCF is what goes into the numbers, the LCM is what the numbers go into. Example: 30 and 42 Factor them. 2 x 3 x 5 = 30 2 x 3 x 7 = 42 Select the common factors. 2 x 3 = 6, the GCF Combine the factors, eliminating duplicates. 2 x 3 x 5 x 7 = 210, the LCM.
Hom many numbers can go into 42?
The positive whole-number factors of 42 are: 1, 2, 3, 6, 7, 14, 21, and 42.
What do 21 and 14 both go into?
The lowest common multiple - is 42 !
What number does 54 and 42 go into evenly?
Their lowest common multiple is 378
What numbers go into both 12 and 20?
The numbers that go into both 12 and 20 are called common factors. To find the common factors of two numbers, you need to identify all the factors of each number and then determine which factors they have in common. The factors of 12 are 1, 2, 3, 4, 6, and 12, while the factors of 20 are 1, 2, 4, 5, 10, and 20. The common factors of 12 and 20 are 1, 2, and 4.
