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What is the least common factor of 12 and 21?
The factors of 12 are 1, 2, 3, 4, 6, and 12. The factors of 21 are 1, 3, 7, and 21. The common factors are 1 and 3. Therefore, the least common factor (the smallest common factor) is 1.
What is the least common factor of 18 and 21?
The factors of 18 are 1, 2, 3, 6, 9, and 18. The factors of 21 are 1, 3, 7, and 21. The common factors are 1 and 3. Therefore, the least common factor (the smallest common factor) is 1. Factorizations: 18-3x3x2 21-7x3
What is the least common factor of 18 21 and 36?
The factors of 18 are 1, 2, 3, 6, 9, and 18. The factors of 21 are 1, 3, 7, and 21. The factors of 36 are 1, 2, 3, 4, 6, 9, 12, 18, and 36. The factors they have in common are 1 and 3. So, the least (or lowest) common factor is 1. Note: The least common factor of two or more positive integers will always be 1.
What is the least common factor of 16 and 21?
The factors of 16 are 1, 2, 4, 8, and 16. The factors of 21 are 1, 3, 7, and 21. The only common factor is 1; they are relatively prime. The least (or lowest) common factor is 1. The greatest (or highest) common factor is 1.
What is the LCM of 28 and 21?
To determine the least common multiple of two numbers, determine the prime factors of both number. Then, determine the prime factors they have in common. Multiply all their prime factors together (in other words, multiply both numbers together) and divide by the prime factors they have in common (in other words, their greatest common factor). The prime factors of 21 are 3 and 7. The prime factors of 28 are 2, 2, and 7. The prime factors in common are a single 7. Therefore, the lowest common multiple is 21 x 28 ÷ 7 = 84
What are the common factors of 12 and 14?
The common factors of 12 and 14 are 1 and 21 and 2
What are the greatest common factor of 21 and 2?
Factors of 21: 1, 3, 7, 21 Factors of 2: 1, 2 GCF (21, 2) =
What is the least common multiple of 2 6 18 and 21?
The Least Common Multiple (LCM) for 2 6 18 21 is 126.
Common factors of 6 and 21?
The factors of 6 are 1, 2, 3, and 6. The factors of 21 are 1, 3, 7, and 21. The common factors of 6 and 21 are 1 and 3, and the GCF is 3.
Why is it that the least common multiple of 10 and 21 is 210?
Because the prime factors of 10 are 2 and 5, the prime factors of 21 are 3 and 7 So multiplying all the higest prime factors: 2*5*3*7 = 210
Common factors of 14 and 21?
Common Factors: 2, 7 Greatest Common Factor: 7 * * * * * 2 is NOT a factor of 21 and so it cannot be a common factor.
What is the common factor for 6 and 21?
6 factors into [2 3] 21 factors into [3 7] Common factor is [3]◄
