Jeden Tag bieten wir KOSTENLOSE Android Apps und Spiele an die ihr sonst kaufen müsstet.
This giveaway offer has been expired. Problem Solving PRO is now available on the regular basis.
★★★★★ Book: Problem Solving
Note: This version has NO ADS, If you want to donate me. Otherwise, you can also read the book as FREE app. Even you want a PDF version to read without paying, just contact me directly, I'll send it to you.
This book the guideline help you to solve your problem.
There are some techniques to solve the problems.
Books & Reference
4.4 and up