Finding the Least Common Multiple: Methods and Techniques

What does LCM stand for?

• Least Common Multiple

• Largest Common Factor

• Largest Common Multiple

• Least Common Factor

Which of the following is a multiple of 4?

• 14

• 10

• 8

• 5

Tags

CCSS.4.OA.B.4

What is the least common multiple of 4 and 6?

• 12

• 8

• 6

• 24

When using the shortcut method, why do we start listing multiples of the greatest number?

• Because the LCM cannot be less than the greatest number

• Because it is a rule

• Because it is easier

• Because it saves time

What is the LCM of 6 and 14 using the shortcut method?

• 14

• 28

• 42

• 56

What is the prime factorization of 16?

• 2^2 * 4

• 4^2

• 2^3

• 2^4

Which of the following is a unique prime factor in the prime factorization of 20?

• 5

• 4

• 10

• 2

When is it better to use prime factorization to find the LCM?

• When the numbers are large

• When the numbers are prime

• When the numbers are small

• When there are only two numbers

What is the LCM of 16 and 20 using prime factorization?

• 40

• 80

• 100

• 60

What is the LCM of 4, 15, and 18 using prime factorization?

• 150

• 120

• 180

• 90