價格：免費
檔案大小：57 MB
版本需求：需要 iOS 7.0 或以上版本。與 iPhone、iPad 及 iPod touch 相容。
支援語言：簡體中文, 繁體中文, 英語
Hi, wanna do some calculting? here is what you need.
Each time we will give you a question, but some of it was missing, maybe a number or maybe an operator, you should find it as soon as possible. It's simple, right?
So, just keep trying, finish as many questions as you can and challenge with your friends.
支援平台：iPhone, iPad