Math 6 Divisibility

How do you know if a number is divisible by 5?

• Digits add up to 5
• Digits add up to ten
• Ends in 5 or 0
• Call my mom

What is the rule to know if a number is divisible by 3?

• Ends in 3
• Starts with 3
• It has 3 digits
• Add the digits and the sum is divisible by 3.

Is this number divisible by 2?
500

• yes
• no

Is this number divisible by three?
337

• yes
• no

Which number is divisible by 9?

• 123
• 100
• 222
• 459

Which number is divisible by 10?

• 712
• 888
• 4780
• 999

Which number is divisible by 5?

• 122
• 235
• 554
• 309

Which number is divisible by 6?

• 231
• 132
• 667
• 19

How do you know if a number is divisible by 2?

• It is even
• It is odd
• It looks pretty
• It makes  you mad

How do you know if a number is divisible by ten?

• It is even
• It ends in 0
• All the numbers are 2
• Look on neighbor's paper