Understanding Least Common Multiple (LCM)

What is a common multiple of two numbers?

• A number that is a multiple of only one of the numbers

• The smallest number that is a multiple of both numbers

• A number that appears in the multiplication table of both numbers

• A number that is not a multiple of either number

What is the Least Common Multiple (LCM) of 6 and 9?

• 36

• 24

• 18

• 12

Why is it useful to find the LCM of two numbers?

• To find the largest number that divides both numbers

• To compare fractions with different denominators

• To add two numbers together

• To subtract one number from another

What is the LCM of 9 and 15?

• 60

• 45

• 75

• 30

How can LCM help in comparing fractions?

• By finding a common denominator

• By subtracting the fractions

• By finding a common numerator

• By adding the fractions

What is the LCM of 4 and 8?

• 16

• 4

• 8

• 12

What is the LCM of 5 and 6?

• 20

• 35

• 25

• 30

What does LCD stand for in the context of fractions?

• Largest Common Denominator

• Least Common Denominator

• Least Common Divisor

• Largest Common Divisor

What is the LCM of 10 and 8?

• 40

• 50

• 30

• 20

How do you find the new numerator when using LCM to compare fractions?

• Subtract the old numerator from the new denominator

• Divide the old numerator by the new denominator

• Add the old numerator to the new denominator

• Multiply the old numerator by the same factor used for the denominator