Share My Creation (Game) Mathdoku

An old project for the math freaks pulled from under a pile of dust and finally finished...

Mathdoku

Try to solve the math based puzzles while keeping these rules in mind...
A value placed in a cell can not reappear in the same row.
A value placed in a cell can not reappear in the same column.
The math operation for each group should be correct.
Groups are surrounded/marked by black lines.

https://play.google.com/store/apps/details?id=com.sorex.mathdoku



Libs used: core, firebaseadmob (ads), phone (keepalive), okhttp & okhttputils2 (ranking)

 

[JordiCP]

Nice!

For those groups where there is an upper left number and an operation, it means that the operation applied to all the cells in the group must result in that number?

But the lower left number is confusing to me

 

[sorex]

the lower left is something you place as temporary value, they call it a marker or pencil value.

you can add it but using the lower row of values (red) after pressing a cell.

if I don't add it they keep nagging about it