BrainBrix

Explanation:

Fill all empty bricks (light gray) with the correct number. Some bricks (dark gray) are predefined. If a brick is selected it will be dyed orange. The button “Test” will mark all bricks with wrong numbers in red color.

If you need help how to go on the button “Solve” will fill the selected brick with the right number. The button “Solve Random” will reveal a randomly selected brick.