The scoreboards spin and a number appears, you are asked with words and audio "How many tens". You must then use your fingertips to indicate how many of each digit there are.
If there are 4 tens then you must hold 4 fingertips onto the screen and wait, if you are correct it will register and move onto the next place value.
The aim is to see how quickly you can answer 10 questions.
To change the number of digits press both cogs at the same time and enter the edit mode where you can pick 2,3 or 4 digit numbers.
NOTE: There is currently a bug in the adobe packager for apps which generates metadata that says this app supports multiple languages. It is only supported in English.