math
posted by tyler .
If stacy jogs every 3rd day and swims every 4th day what day of the week will she end up on

That depends upon which day of the week she starts this routine.
If she starts on Monday, she'll jog on
1st week: Thursday, Sunday
2nd week: Wednesday, Saturday
3rd week: Tuesday, Friday
4th week: Monday, Thursday, Sunday
Fill out the same kind of schedule for her swimming. 
It's a LCM question. It's Thursday.