Finding LCM Using Factor Trees

What is the definition of the Least Common Multiple (LCM)?

• The largest number that divides two numbers

• The smallest number that two numbers divide evenly into

• The sum of two numbers

• The difference between two numbers

What is the first step in finding the LCM of 6 and 8 using prime factorization?

• Add the numbers

• Subtract the numbers

• Create factor trees

• Multiply the numbers

What are the prime factors of 6?

• 1 and 6

• 2 and 3

• 3 and 6

• 2 and 4

Tags

CCSS.4.OA.B.4

What is the LCM of 6 and 8?

• 12

• 18

• 24

• 30

What is the prime factorization of 16?

• 2 x 4

• 4 x 4

• 2 x 2 x 2 x 2

• 2 x 8

What is the LCM of 16 and 24?

• 32

• 48

• 64

• 72

What is the LCM of 15 and 28?

• 140

• 210

• 280

• 420

Which of the following is a prime factor of 28?

• 5

• 9

• 2

• 3

Tags

CCSS.4.OA.B.4

What is the LCM of 30, 12, and 8?

• 90

• 120

• 150

• 60

When finding the LCM of multiple numbers, what should you be careful with?

• Spacing in the prime factorization chart

• Adding the numbers

• Subtracting the numbers

• Dividing the numbers