Use a calculator or (if you are very good in maths) pen and paper. Please note this test is not yet complete. this is a game where you can do the same as pokemon except to catch them or defeat them you will have to answer their maths questions. future updates: pokeball text on bottom the full game (different project)
All the sprites are taken from google and the trainer back sprite from @innermobius I dont know who he is. The arceas sprite from dex.pokemonshowdown.com . The math book by me.