Problem Solving Experiences in Mathematics / Lists

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When	What	Who	Comment
1 minute ago	Make it work! (list) - diff	lapius	Added Insects to the list.
1 minute ago	Make it work! (list) - diff	lapius	Added Sound to the list.
1 minute ago	Make it work! (list) - diff	lapius	Added Earth to the list.
2 minutes ago	Make it work! (list) - diff	lapius	Added The Roman Empire to the list.
2 minutes ago	Make it work! (list) - diff	lapius	Added Rivers to the list.