. Kelsey is 11 and Tom is 9, so they each do three chores a day. Amy and Marry are 5-year-old twins, so they each do just one chore a day.
2. Amy and Marry each do a different chore each day, but they do not take out the garbage, sweep the floors, or tidy the living room.
3. Both Kelsey and Tom must do each chore at least once a week.
4. No child may do the same chore two days in a row.