Factors and Multiples

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

List the first five prime numbers.

Back

2, 3, 5, 7, 11

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.

Front

List the factors of 12.

Back

1, 2, 3, 4, 6, 12

Front

What is the only even prime number?

Back

2

Front

How do you find the factors of a number?

Back

To find the factors of a number, divide it by all integers from 1 to that number and check which divisions result in whole numbers.

Front

What are multiples of a number?

Back

Multiples of a number are the result of multiplying that number by integers (e.g., multiples of 3 are 3, 6, 9, 12, etc.).

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 each of the numbers.

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

Is 15 a prime number?

Back

No, 15 is not a prime number because it has factors other than 1 and itself (1, 3, 5, 15).