PROBLEM:
In an exam, there were 10 questions. A correct answer was worth
20 points. A wrong answer meant having 10 points deducted.
Greg
attempted all ten questions, and gave an answer for all questions.
If Greg scored a total of 20 points, how many wrong answers did he
have? |
Hint 1
Hint 2
Hint 3
Hint 4
Hint 5
Hint
6
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PROBLEM-SOLVING CHALLENGE
#904