價格：免費
檔案大小：5.7 MB
版本需求：需要 iOS 6.0 或以上版本。與 iPhone、iPad 及 iPod touch 相容。
支援語言：英語
Train your brain to spot mathematical errors. Select true or false and progress as fast as possible. Solve at least 10 problems to go to the next level. The faster you solve - the more points you collect. Power-ups enabled.
支援平台：iPhone, iPad