Question 11
Arden always tells the truth on Tuesdays, Wednesdays and Thursdays, always lies on Sundays, and may tell the truth or lie on other days. For five consecutive days, he was asked his grade and answered, in order: Primary 2, Primary 3, Primary 4, Primary 2, Primary 5. What grade was Arden in? Assume his grade stayed the same during these five days.