Good concept but....

This app is a diamond in the rough. Finding the numbers is very challenging but doable. My type of game.

The unsolvable problems are the site itself. The app developer doesnt appear to maintain the site. The ad-free version (which I was going to buy), was of no avail, I was unable to purchase coins through the app, and the free version and the pop ups make solving the puzzle impossible.

Plus, no incentive is in tact for the game. Potential is great....Ill return later to see if I can "buy" the add-free version.

TJ.bowers about What's The Missing Number? Ultimate Puzzle Math Quiz Game - Brain Teaser & Intelligence Quotient (IQ) Logic Test for Adults & Kids