Hilda and Irene have telephone duty together on Friday.
Irene has telephone duty for exactly three days of the week.
5.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.
6.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.
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