Busy. Please wait.
Log in with Clever

show password
Forgot Password?

Don't have an account?  Sign up 
Sign up using Clever

Username is available taken
show password

Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Didn't know it?
click below
Knew it?
click below
Don't Know
Remaining cards (0)
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Divisibility rules

2 The last digit is even
3 If you add up all the digits and the answer is divisible by three, then the whole number is divisible by three
4 The last two digits are divisible by four
5 The number ends in five or zero
6 The number is divisible by three and two
7 If you double the last digit and minus it from the rest of the digits and the answer is seven or zero, then the whole number is divisible by seven
8 The last three digits are divisible by three
9 If you add up all the digits and the answer is divisible by nine, then the whole number is divisible by nine
10 The number ends in zero
11 If you add up every first number and every second number and minus it from each other and the answer is zero or eleven, then the number is divisible by eleven
12 The number is divisible by three and four
Created by: Gemma Gilowey
Popular Math sets




Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
restart all cards