Why these three?
Job forms, admissions and merit lists keep asking for the same numbers. Your age on the closing date decides whether you may apply at all. Your GPA or CGPA and your marks percentage decide whether you meet the minimum qualification and where you stand on the merit list.
The results are worked out on your own device and nothing is stored. They are meant as a guide: the advertisement and your institution's rules always come first. Also useful: PDF tools to prepare your documents and the CV Builder.