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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!