- Required Problems: 20
- Demo version: Your score will not be saved
- Score 90% or better for full points
- Time Limit: 5 Minutes

Identify each interval interval by its size. Only simple intervals will be shown: 1 (unison/prime), 2 (second), 3 (third), 4 (fourth), 5 (fifth), 6 (sixth), 7 (seventh), 8 (octave).

*If the time limit is stressful, try Practice Mode.