A fleet of space aliens is descending – but if you can target the ships marked with the right percentage, you can chase them away!
Before the game, you can choose a percentage to practice with – such as 25% - and then the game begins. A series of questions will appear on the screen as the balloon invaders descend towards you. You must shoot the one with the right answer on – such as 5 being the right answer to “What is 25% of 20?”. Get it wrong, and the invaders will move ever closer to you. Get too close and it’s game over.
However, get the right answers and you can clear the screen of invaders and move up to the next level, building up your score all the time. See how many waves of invaders you can fend off!