Download Permutation and combination APK v30

Instructions for installing Permutation and combination

Click on the saved APK file Permutation and combination. You may experience a problem that does not allow installation.
By default, Android phones do not allow the installation of APKs from Unknown Sources (Unknown Sources), please do the following:
-> Open the downloaded Permutation and combination .apk file. You will see a warning message as shown:



-> Click Settings (Settings).
-> Click the Turn button (Turn on).
-> Go back and select the downloaded APK file. Click the Install button (Install).

Instruction to install OBB file

+ Please download the APK file of Permutation and combination first.
+ Then copy the APK file to your device's SD card and Install it. (Don't open it after installing)
+ Next, download the Obb file and copy the * .obb file named '' to the required location:
/ SDCARD / Android / obb / appinventor.ai_1032041.math /
-> The full / absolute path of the obb file will look like this (Remember case sensitive):
If you don't have such a folder, create it manually on your SD card.