George and Irene have telephone duty together on Wednesday.
George and Hilda have telephone duty together on Friday.
Hilda and Irene have telephone duty together on Wednesday.
Hilda and Irene have telephone duty together on Friday.
Irene has telephone duty for exactly three days of the week.
3.If Hilda and Irene have telephone duty together on
Monday and on Wednesday, which of the following must be true?
George and Hilda have telephone duty together on Friday.
George and Irene have telephone duty together on Friday.
George has telephone duty on exactly three of the days of the week.
Hilda has telephone duty on exactly three of the days of the week.
Irene has telephone duty on exactly three of the days of the week.
4.If George and Hilda have telephone duty together on Monday and George and Irene have telephone duty together on Friday, any of the following can be true EXCEPT:
George and Hilda have telephone duty together on Wednesday.
George and Irene have telephone duty together on Wednesday.
George has telephone duty for four days of the week.
Irene has telephone duty for four days of the week.
Hilda and Irene have telephone duty together for two days of the week.
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