Classwork on GCF, LCM, Prime and Composite Numbers

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

What is a composite number?

Back

A composite number is a natural number greater than 1 that has more than two positive divisors.

Front

What is the greatest common factor (GCF)?

Back

The greatest common factor (GCF) of two or more numbers is the largest number that divides all of them without leaving a remainder.

Front

What is the least common multiple (LCM)?

Back

The least common multiple (LCM) of two or more numbers is the smallest number that is a multiple of all of them.

Front

Which number is neither prime nor composite?

Back

1 is neither prime nor composite.

Front

Find the least common multiple (LCM) of 4 and 5.

Back

The LCM of 4 and 5 is 20.

Front

What is a factor?

Back

A factor is a number that divides another number without leaving a remainder.

Front

What is a multiple?

Back

A multiple of a number is the product of that number and an integer.

Front

Find the GCF of 12 and 18.

Back

The GCF of 12 and 18 is 6.

Front

Find the LCM of 6 and 8.

Back

The LCM of 6 and 8 is 24.