You are downloading the MathGym XAP file v22.214.171.124 for Windows Phone. MathGym is a free and fun Educational game: Practise mental calculations and get instant statistics on how fast you are doing. You can select number of digits to practise, arithmetic operations ... You can now download the offline XAP file to install & try it.
Download Locations for MathGym 126.96.36.199 XAP file
Important Notice: Now Due To Unspecified Limitations, You Can Not Use The Offline XAP File To Install It Any More.
To try to install it manually from an SD card, you should choose one of the server location above to get the offline MathGym XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.