Three nurses
There are 3 nurses and they work together only once in a week.
No nurse is called to work for 3 consecutive days.
Nurse 1 is off on Tuesday, Thursday and Sunday.
Nurse 2 is off on Saturday.
Nurse 3 is off on Thursday, Sunday. No two nurses are off more than once a week.
Find the day on which all the 3 nurses are at work.