A free app for Android, by a1games.

Do you want to sharpen your basic math skill?

Join this simple math game and learn how much you can improve your math skills!Math Puzzle: Riddles Brain Game is a simple math game with over 49 levels. As you solve the puzzles, the difficulty will increase.

The numbers are in a 5×5 grid, so there are 16 possible combinations of numbers on each square. Each combination has an operation sign next to it. Some of the squares will be empty. To complete the puzzle, you need to drag answers from the answer panel onto blocks in the grid. When you drag an answer onto a block, if it fits perfectly, it disappears; if it doesn’t fit perfectly, it stays on the block and becomes part of the solution when you drag another answer onto it.