Numbers and Cannons Prime Composite

Identify the numbers on the barrels as being prime or composite. Load up the cannon with that type of ammo and fire away. 25 levels to complete without any time limit.

To shoot the cannon, you'll need to load it with the correct "prime/composite shot" and then hold down the left mouse button or your finger to aim and set power. Release to fire the cannon. There's also a video available via the Walkthrough link that shows solutions to all of the levels in case you get stuck.