Greatest Common Factor and Least Common Multiple

Math ⇒ Number and Operations

Greatest Common Factor and Least Common Multiple starts at 6 and continues till grade 12. QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Greatest Common Factor and Least Common Multiple. How you perform is determined by your score and the time you take. When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.

See sample questions for grade 9

Explain how to find the LCM of two numbers using their prime factors.

Explain the difference between GCF and LCM.

Explain why the GCF of any number and 1 is always 1.

Find the GCF and LCM of 14 and 49.

Find the GCF and LCM of 16 and 20.

Find the GCF of 120 and 144.

Find the GCF of 42, 56, and 70.

Find the GCF of 81 and 135.

Find the LCM of 14, 21, and 28.

Find the LCM of 18 and 24.

Find the LCM of 25 and 30.

Find the LCM of 7 and 9.

Find the LCM of 9, 12, and 15.

If the GCF of two numbers is 1, what are these numbers called?

If the GCF of two numbers is 2 and their LCM is 30, what could the two numbers be?

If the GCF of two numbers is 4 and their LCM is 60, what is the product of the two numbers?

If the GCF of two numbers is 8 and their LCM is 96, what is the product of the two numbers?

If the GCF of two numbers is equal to one of the numbers, what can you say about the two numbers?

If the LCM of two numbers is 60 and their GCF is 5, what could the two numbers be?

If the LCM of two numbers is 72 and one of the numbers is 8, what is the smallest possible value of the other number?