Five girls are not in complete agreement about the date of the Math test.
- Andrea says it will be in August, 16th, Monday;
- Daniela says it will be in August, 16th, Tuesday;
- Fernanda says it will be in September, 17th, Tuesday;
- Patricia says it will be in August, 17th, Monday;
- Tatiane says it will be in September, 17th, Monday.
Only one of them is completely right.
The others guessed at least one of these information correctly: the month, the day or the weekday.
Who is right?
Problem Source: OBMEP 2014