Solve puzzles by filling a grid with numbers that add up to given clues. Each row and column must contain unique digits. Complete the grid by ensuring all sums match clues and no duplicates exist in any sum.
Play a mental calculation game by clicking bubbles in ascending order. Track progress through 5 difficulty levels. Compete in Game Center rankings. Manage time limits and avoid tricks. Sync across devices for iPad and iPhone.
Solve crosswords with 5x5 or 7x7 grids. Fill in numbers to complete additions and subtractions. Choose number ranges from 1-10, 1-25, or 1-50. Select easy or hard difficulty. In easy mode, only fill in results after the equals sign.
