In an IQ test, 4 marks are given for every correct answer and 2 marks are deducted for every wrong answer. If Crystal answered 30 questions and scored 84 marks, how many of her answer were correct?

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Marc Selis asked Sep 23, 2022

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In an IQ test, 4 marks are given for every correct answer and 2 marks are deducted for every wrong answer. If Crystal answered 30 questions and scored 84 marks, how many of her answer were correct?

Mathematics
high-school

Marc Selis asked Sep 23, 2022

by Marc Selis

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It’s 18 because
4x30=120
120-84=36
36/2=18
So the correct answer is 18.

Sachin Vishwakarma answered Sep 28, 2022

by Sachin Vishwakarma

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