Twentyfour Challenge app for iPhone and iPad

4.9 ( 6519 ratings )

Games Education Educational Puzzle
Developer: primesRus LLC

Free

Current version: 1.3.1, last update: 7 years ago
First release : 10 Oct 2013
App size: 5.51 Mb

Twentyfour Challenge is a new version of the old game called "24." The goal is to combine the given numbers using +, -, /, and * to make the target number. It is a good brain exercise for all ages.

In particular it teaches children:
- basic arithmetic skills
- operator precedence
- expression evaluation

Game features include:
- tracking of personal high scores
- whole numbers and fractions
- various difficulty levels

Best of all its free!