Number King promotes agile mathematical reasoning as you attempt to solve each multi-step puzzle as quickly as you can. Each puzzle contains a target number, a set of source numbers, and a choice of operators. Use all the source numbers and +, -, x, or ÷ to make the target number. Off to the wrong start? Reset the puzzle and try again. Number King times you as you tap through the equations, rewarding you for fast thinking.

Level Mode offers puzzles of increasing difficulty. Solve the simpler ones to unlock tougher challenges.

Beat the Clock Mode challenges you to solves as many puzzles as possible in 150 seconds.

Practice Mode allows you to practice for an unlimited amount of time, solving puzzles at your own pace.

Enjoy all 30 Easy Levels for free (90 puzzles in all!) and sample the first two Medium and Hard puzzle sets. Then, unlock all difficulties and all single-player game modes with one in-app purchase.

What else can we do to make this app even more useful? Please email us at [email protected] to let us know.