If you've finished this game you might want to try one of the different versions of this game below:
Find the linear equation whose slope matches the number on the barrel you want to shoot. Choose that equation and shoot the barrel to destroy it. Be careful calculating the slope and aiming as there is limited ammo. There are 25 levels for you to complete without any time limit.
To shoot the cannon, you'll need to load it with an "linear equation 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 Video icon on the main menu that shows solutions to all of the levels in case you get stuck. Hint: On some of the later levels it is a good idea to figure out which buttons you'll need to use before you set things in motion.
Below Are More MathNook Geometry Games