Prime Time Unit Review

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

How can you determine if a number is even or odd from its prime factorization?

Back

If a number has at least one factor of 2 in its prime factorization, it is even. If it has no factors of 2, it is odd.

Front

What is the prime factorization of a number?

Back

The prime factorization of a number is expressing it as a product of prime numbers.

Front

Find the GCF of 60 and 42.

Back

6

Front

Find the LCM of 60 and 42.

Back

420

Front

What is the prime factorization of 27?

Back

3 x 3 x 3 (or 3^3)

Front

What is the prime factorization of 120?

Back

2 x 2 x 2 x 3 x 5 (or 2^3 x 3 x 5)

Front

What does it mean for a number to be prime?

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 is not prime, meaning it has more than two positive divisors.