Four sixteenth notes can be played in the same amount of time as one quarter note. Therefore, the correct responses would be:
- quarter notes (correct)
- eighth notes (no response needed)
- half notes (no response needed)
- whole notes (no response needed)
To clarify further, two eighth notes can be played in the same amount of time as one quarter note, and one half note can be played in the same amount of time as two quarter notes. A whole note takes twice as long as a half note.
If you're only seeking to compare four sixteenth notes with other note values, just remember they equal one quarter note.