What is a common factor of 20 and 21?

What is a common factor of 20 and 21?

What is the GCF of 20 and 21? The GCF of 20 and 21 is 1.

What is the least common multiple of and 21?

What is the LCM of 21 and 21? The LCM of 21 and 21 is 21.

What’s the least common multiple of 27 and 15?

135
Answer: LCM of 15 and 27 is 135.

What is the least common multiple of 21 and 28?

84
Answer: LCM of 21 and 28 is 84.

What is the LCM of 3 and 7 and 21?

LCM of 3 and 7 can be obtained by multiplying prime factors raised to their respective highest power, i.e. 31 × 71 = 21. Hence, the LCM of 3 and 7 by prime factorization is 21.

What is the LCM of 11 15 and 21?

The least common multiple of 21, 11 and 15 is 1155.

How do you calculate least common multiple?

One way to find the least common multiple of two numbers is to first list the prime factors of each number. Then multiply each factor the greatest number of times it occurs in either number. If the same factor occurs more than once in both numbers, you multiply the factor the greatest number of times it occurs.

What is the LCM of 7 18 and 21?

The least common multiple of 7, 18 and 21 is 126. Why learn this The least common multiple (LCM) can be used to add or subtract unlike fractions, or fractions with different denominators, by helping to find the lowest common denominator.

How do you find the least common multiple?

Calculate the least common multiple. To do this, multiply together all of the factors in your multiplication sentence. For example, 2×2×5×7×3=420{\\displaystyle 2\imes 2\imes 5\imes 7\imes 3=420}. So, the least common multiple of 20 and 84 is 420.

What is the lowest common multiple?

The smallest common multiple of two or more numbers is called the lowest common multiple (LCM). E.g. Multiples of 8 are 8, 16, 24, 32, Multiples of 3 are 3, 6, 9, 12, 15, 18, 21, 24,