Question 16
In a quiz, a correct answer to the first question earns one sweet. Starting with question 2, each correct answer triples the sweets currently held; a wrong answer loses as many sweets as the question number. Nam stops after answering question 6. He answered question 4 incorrectly. He then exchanges all his sweets for oranges at a rate of 5 sweets per orange. How many oranges does Nam finally have?
