CalQ: Math Board Game for Your Brain
Giving your brain a workout once in a while is a great way to keep it sharp. Math can be your best friend here. CalQ is one of many math apps you can try to keep your mind sharp. The goal is to solve as many target numbers as possible. The more combined tiles you achieve, the more points you earn.
The game has a Normal and TimeAttack mode. It comes with tiles that can be numbers, multiplications, and stars. Simply swipe your fingers over cells to match the target number.