Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

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.

By signing up, I agree to StudyStack's Terms of Service and Privacy Policy.

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.

Remove ads
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards

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

Prime or Comp? 1-50

Decide whether the each number is prime, composite or neither. (#1 -50)

0 Neither
1 Neither
2 Prime
3 Prime
4 Composite
5 Prime
6 Composite
7 Prime
8 Composite
9 Composite
10 Composite
11 Prime
12 Composite
13 Prime
14 Composite
15 Prime
16 Composite
17 Prime
18 Composite
19 Prime
20 Composite
21 Composite
22 Composite
23 Prime
24 Composite
25 Composite
26 Composite
27 Composite
28 Composite
29 Prime
30 Composite
31 Prime
32 Composite
33 Composite
34 Composite
35 Composite
36 Composite
37 Prime
38 Composite
39 Composite
40 Composite
41 Prime
42 Composite
43 Prime
44 Composite
45 Composite
46 Composite
47 Prime
48 Composite
49 Composite
50 Composite
Created by: gwunsch