20 questions, 7-2-0 points, 87 total - Portugal OPM 1997 p1
Source:
May 18, 2024
algebranumber theory
Problem Statement
A test has twenty questions. Seven points are awarded for each correct answer, two points are deducted for each incorrect answer and no points are awarded or deducted for each unanswered question. Joana obtained points. How many questions did she not answer?