Back upon app for iPhone and iPad

4.0 ( 2160 ratings )

Games Educational Trivia
Developer: Hefei Bacheng Network Technology Co., Ltd.

Free

Current version: 1.0, last update: 7 years ago
First release : 10 Mar 2016
App size: 56.85 Mb

Please remember the pairs (each letter or number stands for one operation).
Then try to remember operation which the letter or number we show you stands for.
Do u have good memory? come and try!