Unit 4 Test: Real Number System

Front

What is a composite number?

Back

A composite number is a positive integer that has at least one positive divisor other than one or itself. For example, 4, 6, and 8 are composite numbers.

Front

What is a prime number?

Back

A prime number is a natural number greater than 1 that cannot be formed by multiplying two smaller natural numbers. For example, 2, 3, 5, and 7 are prime numbers.

Front

What is the GCF (Greatest Common Factor)?

Back

The GCF of two or more numbers is the largest number that divides all of them without leaving a remainder. For example, the GCF of 16 and 24 is 8.

Front

What is the LCM (Least Common Multiple)?

Back

The LCM of two or more numbers is the smallest number that is a multiple of all of them. For example, the LCM of 2, 5, and 10 is 10.

Front

What is the GCF of 20 and 80?

Back

The GCF of 20 and 80 is 20.

Front

What is the GCF of 16 and 24?

Back

The GCF of 16 and 24 is 8.

Front

What is the LCM of 2, 5, and 10?

Back

The LCM of 2, 5, and 10 is 10.

Front

What type of number is 30?

Back

30 is a composite number.

Front

What type of number is 37?

Back

37 is a prime number.

Front

How do you determine if a number is prime?

Back

To determine if a number is prime, check if it has exactly two distinct positive divisors: 1 and itself.