Standard pyramid: Push the button. Add up two numbers in a row next to each other. Enter this value in the box above these two numbers. Fill in all the boxes and make sure you've calculated it right. Push the {Check] button to validate your results. Each level will be more difficult. This game is a fun way to practice mental arithmetic.
Arjen van den Broek is the official developer of Number Pyramid that can be found in the Education Games category. Over 10K users set up the game and its most recent update was released on Feb 8, 2019. This application has been rated 3.6 on Google Play.
Download the installer of Number Pyramid 3.0 for free and take a look at users' reviews on Droid Informer. The app can be launched on Android devices 2.1 and above. It's safe to download the app.