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What is the divisibility rule for 5?

• The digits must add up to 10.
• The last digit needs to be a 5 or 0.
• The last digit can only be a 5.
• The sum of the digits need to be divisible by 5.

Is 525 divisible by 5?

• Yes
• No

All of these numbers are divisible by 5 except for...

• 75,395
• 984,940
• 222,222,235
• 8,943,892

Which of the following is an even number?

• 1
• 9
• 4
• 5

Is 1,284,604 divisible by 2?

• Yes, because the sum of the digits is 20, which is an even number

• No, because 4 is an odd number

• Yes, because 4 is an even number

• No, because the it is not divisible by 3

What is the divisibility rule for 3?

• Add up the digits. The sum must be an even number

• The digits must add up to 9.

• The last digit must be a 3.

• Add up the digits. The sum must be a multiple of 3.

Is 81 divisible by 3?

• Yes, because the sum of the digits is 9, a multiple of 3

• No, because 81 is an odd number

• Yes, because 81 is an odd number

• No, because 81 does not end in 3

Is 816 divisible by 3?

• Yes
• No

Is 36,928 divisible by 4?

• Yes, because the sum of the digits is a multiple of 4

• Yes, because it is an even number

• Yes because the last two digits, 28, is divisible by 4

• Yes, because it is divisible by 2 and 3

A number is divisible by 10 if

• It is even

• It ends in 0

• It ends in 0 or 5

• The sum of the digits is a multiple of 10