Exercise your brain! This game will test your memory, reaction time and math skills. To play, you select a "Base" number or use 9 as the default. After pressing Start you will have one minute to score as many points as you can. To score select three tiles that add up to a number that is a multiple of the Base number selected. So if you select 5 the three tiles should add up to a number you can divide by 5 ( ie 10, 25, 35, 40, etc).