Posted by ryan on Monday, November 10, 2008 at 8:47pm.
30 days later. this is like least common multiples... 2, 5, 15. the least common multiple is 30.
Today is Day 1.
She does laundry on days 1, 3, 5, 7, 9, etc.
She changes sheets on days 1, 6, 11, 17, 21, 16, 31, etc.
She dusts on days 1, 16, 31, etc.
She changes sheets on days 1, 6, 11, 16, 21, 26, 31, etc