The least common multiple (LCM) is often also called the lowest common multiple or smallest common multiple. Keep in mind that these different terms all refer to the same thing: the smallest positive integer which is a multiple of two or more numbers.
The least common multiple of 21, 28, and 33 is 924.
The Least Common Multiple (LCM) for 28 21 56 is 168.
The Least Common Multiple (LCM) for 28 14 21 is 84.
Least Common Multiple is 84
The Least Common Multiple (LCM) for 7 21 28 60 is 420.
The Least Common Multiple (LCM) for 28 35 21 14 is 420.
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
The Least Common Multiple (LCM) for 21 28 is 84.
252