Make10 ~10 puzzle~ GAME
This is a game that improve your calculation and memorization skills.
In addition to 4 numbers, you can also play 10 puzzles with 3 numbers and 5 numbers. You can play a total of 2,490 puzzles, so you will never get bored.
Even if you can solve the puzzle, you can find the answer by watching at the ads. So, you won't get frustrated.