Mysterious Number

This is a fun game that helps children learn mathematics plus, minus, and multiply by means of games.
By calculating math problems, children look for treasure chests in nine grids and collect wisdom coins. You can exchange all kinds of props in the prop store, collect more props faster, play 3 kinds of difficulty, the wisdom gold coins obtained by the treasure chest are different, hurry to start your brain, try to get more wisdom gold!
Note:This app does not include virtual currency and third party payments.