LCM and GCF Review

Front

What is the GCF (Greatest Common Factor)?

Back

The GCF is the largest number that divides two or more numbers without leaving a remainder.

Front

How do you find the GCF of two numbers?

Back

You can find the GCF by listing the factors of each number and identifying the largest common factor.

Front

What is the LCM (Least Common Multiple)?

Back

The LCM is the smallest number that is a multiple of two or more numbers.

Front

How do you find the LCM of two numbers?

Back

You can find the LCM by listing the multiples of each number and identifying the smallest common multiple.

Front

What is a prime number?

Back

A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself.

Front

Is 1 a prime number?

Back

No, 1 is not a prime number because it does not meet the definition of having exactly two distinct positive divisors.

Front

What are the prime numbers between 1 and 20?

Back

The prime numbers between 1 and 20 are 2, 3, 5, 7, 11, 13, 17, and 19.

Front

What is the GCF of 12 and 18?

Back

The GCF of 12 and 18 is 6.

Front

What is the LCM of 3 and 5?

Back

The LCM of 3 and 5 is 15.

Front

What are the factors of 24?

Back

The factors of 24 are 1, 2, 3, 4, 6, 8, 12, and 24.