Exploring the Rules of Divisibility

Which of the following numbers is divisible by 2?

• 37

• 49

• 22

• 15

A number ending in which digit is always divisible by 5?

• 7

• 5

• 3

• 1

What is the rule for a number to be divisible by 10?

• It ends in 0

• It ends in 5

• It is even

• It is odd

How do you determine if a number is divisible by 3?

• Check if it ends in 0

• Check if it is even

• Add the digits and see if the sum is a multiple of 3

• Check if it ends in 3

What is the rule for a number to be divisible by 4?

• The number ends in 0

• The number is even

• The last two digits form a number divisible by 4

• The last digit is 4

If the sum of the digits of a number is a multiple of 9, what can be said about the number?

• It is divisible by 3

• It is divisible by 10

• It is divisible by 5

• It is divisible by 9

Which rule is similar for both 3 and 9?

• Check if the number is even

• Check if the number ends in 0

• Add the digits and see if the sum is a multiple of the number

• Check if the number ends in 5

What is the main idea of the divisibility rules?

• To understand addition

• To learn multiplication

• To simplify the process of checking if a number is divisible by another number

• To make division harder

Which of the following is NOT a rule for divisibility?

• A number is divisible by 10 if it ends in 0

• A number is divisible by 7 if it ends in 7

• A number is divisible by 5 if it ends in 5 or 0

• A number is divisible by 2 if it is even

What is the purpose of learning divisibility rules?

• To make learning fun

• To make division easier

• To make addition easier

• To make multiplication easier