13 is a arithmetic based puzzle game. Select the operator that will cause the given numbers to equate the goal result. Completing this in a low number of turns will earn higher scores.

Reaching the goal number will unlock fun Math facts. They're fun! FUN!

13 was inspired by the games my High School math/physics/engineering teacher dad would show my sister and I when we were trying to kill time wait for our food at restaurants.

So with that in mind...
It's definitely more fun
than doing nothing at all.

Made with Twine from http://twinery.org/ & SugarCube from http://www.motoslave.net/sugarcube/
SugarCube (v1.0.26)