quick study - one who is able to memorize something easily and quickly or is able to understand and deal with something easily and successfully; someone able to acquire new knowledge and skills rapidly and easily.
assimilator
learner
scholar
1. Quick learner. 2. Wiki learner 3. Rapid learner.
pupil
pupil
A quick learner or a fast learner.
A synonym for "singing fast" could be "singing briskly." This phrase conveys the idea of performing a song with a quick tempo or lively pace. Other alternatives might include "singing rapidly" or "singing swiftly."
You may be asked in an interview to give an example where you are a fast learner. This is designed to tell a potential employer how you see yourself as picking up new skills.
Pupil or Scholar are a few.pupil
beginner, learner, recruit, apprentice, nonprofessional, novice
A synonym for "very fast" is quick.
Slow and fast are antonyms; a synonym is a word with a similar meaning.
The ability to grasp new concepts quickly = fast learner
Adaptable