Question 30
Yesterday, Alice bought nine identical boxes of face masks from a pharmacy. The faulty receipt printer blurred one digit of the total, leaving 367*198, where * is the blurred digit. What is the missing digit?

Receipt convention: all boxes have the same integer unit price in the displayed currency unit, and no extra fees or discounts alter the total.

Receipt convention: all boxes have the same integer unit price in the displayed currency unit, and no extra fees or discounts alter the total.