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Why is 3 the gcf of 12 and 33?
3*4 = 12 3*11 = 33 so 3 is a factor of both 12 and 33. That is 3 is a common factor. No number larger than 3 is a factor of BOTH the numbers so 3 is the greatest common factor.
What is the smallest number that has both 4 and 12 as a factor?
12 is.
Why is 4 the greatest common factor of 12 and 40?
Because 4 is the largest number that will divide into both of those numbers evenly, with no remainder.
What prime number is a factor of 12 and 27?
The prime factors of 12 are 2 and 3. The only prime factor of 27 is 3. The prime number that both 12 and 27 have as a factor is 3.
What is the least common factor of 5 and 12?
The least common factor of 5 and 12 is the smallest number which divides both of them and it is 1, as it is for all pairs of numbers.(It is also the highest common factor of 5 and 12, as 5 and 12 only have one common factor: 1.)The least, or lowest, common multiple of a pair of numbers is the smallest number which is a multiple of both of them, which for 5 and 12 is 60.
