Prime Numbers, Factors, and Multiples Explained

The video tutorial introduces prime numbers, explaining that they have only two factors: 1 and the number itself. It highlights that 1 is not a prime number and 2 is the only even prime number. The tutorial then moves on to factors, which are numbers that divide exactly into another number, often occurring in pairs. Examples are provided using the number 24. Finally, the video covers multiples, which are values in the times table of a number, and their connection to factors. Examples of multiples of 9 and 7 are given.

Which of the following numbers is the only even prime number?

• 1

• 2

• 3

• 4

What is a factor of a number?

• A number that is always odd

• A number that divides another number with a remainder

• A number that divides another number exactly with no remainder

• A number that is a multiple of another number

Which of the following is NOT a factor of 24?

• 8

• 6

• 5

• 3

What is a multiple of 9?

• 25

• 15

• 18

• 22

Which of the following numbers is a multiple of 7 between 30 and 60?

• 45

• 35

• 32

• 40