Math N

It will generate four numbers. You have to use addition, subtraction, multiplication, and division until you are left with only your target number. You can copy and share level IDs to play the same level again.
Daily: Just like Classic, but everyone gets the same problem each day.
Custom: Use this mode to create your own challenges.
Arcade: This mode will give you ten puzzles. You score points if you solve a puzzle quickly without looking at the solution. After all ten puzzles are complete, it saves your score on a local leaderboard.
Genius: This mode takes everything from Classic a few steps further. It includes polynomials, square roots, imaginary numbers, mathematical constants (e and pi), and variables (x). Plus, each level starts off with a single transformation, chosen out of four, to one of your starting numbers, like a square root, exponent, or inverse. Note: Level IDs from this mode *may* not transfer to future versions of the app.