Special trains are used to transport large quantities of cargo. Today in a new exciting online game Train Builder you will create such trains and freight cars. Your train will be visible on the screen in front of you. Silhouettes of wagons will be hooked to it. A mathematical equation will appear at the bottom of the playing field. You will need to solve it in your mind. After that, use the mouse to select the correct answer from the options offered. If the answer is correct, then you will build a freight car and move on to solving the next equation.
