Numberio

Use four numbers and basic math operators to make a given target number. Use each number exactly once.

*RANKED MODE*

Your rating goes up as you solve puzzles correctly, and down as you skip them. As your rating increases, so does your rank. There are 8 ranks in all!

*CASUAL MODE*

Choose from Normal, Hard, or Expert puzzles.

New! *TIMED MODE*

You have two minutes to solve as many problems as you can. You gain points for each puzzle solved, and your high score is recorded.