In 9th grade College Prep Science our first test had small font instructions at the top
"Every answer on this test is A; regardless of whether it's correct or not. Example: A) 2+2=5 is the correct answer. Any other answer will be counted wrong even if the answer is right. Example: B) 2+2=4 will be counted wrong."
The instructions in large print were:
"CHOOSE THE CORRECT ANSWER FROM THE CHOICES BELOW:"
It was to teach us to read instructions.
Me and my best friend tapped the top of the page - we were among the few that got a 100.
The teacher repeated the test the following Spring. Not everyone made a 100.