Traditional QR codes lack real-time interactivity in offline educational scenario. To overcome this limitation, this research employs executable QR code (eQR Code) technology to design and implement a mobile application that generates and evaluates math exercises offline. A specialized dialect, QReduApp, was developed based on the QRscript language and integrates a compilation toolchain with a virtual machine to enable real-time answer verification. This research offers an innovative solution for interactive educational tools without internet access.