3. Factors and Multiples

Lcm — Quiz

Test your understanding of lcm with 5 practice questions.

Practice Questions

Question 1

When adding the fractions $ \frac{3}{10} $ and $ \frac{1}{4} $, what is the least common denominator (LCD) that should be used?

Question 2

Consider two numbers, $A$ and $B$. If their greatest common divisor (GCD) is 5 and their product is 150, what is their least common multiple (LCM)?

Question 3

What is the least common multiple (LCM) of 15 and 20?

Question 4

When comparing the fractions $ \frac{5}{8} $ and $ \frac{7}{12} $, what is the least common multiple of their denominators that should be used to find a common denominator?

Question 5

Which of the following expressions correctly represents the least common multiple (LCM) of two numbers, $A$ and $B$, using their prime factorization?