If you like our problems, we will make more for you and from different math domains.
Ramnicu Valcea, Romania
The button: “Find the next [match]” is used first to check if a formula can be applied and second in what place you choose to apply.
The button: “Apply” should be clicked after you find a place
to apply with button:”Find the next [match]”.
“Mathematics is a game played according to certain simple rules with meaningless marks on paper.”
These images show how XPuzzle App looks:
Get the app on Google Play https://play.google.com/store/apps/details?id=com.CDFSoft.start.spv