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7th Grade Challenging Math

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7-74)   Answer

          5 questions

 

 

Solution: If Raj got all 20 questions right, he would have gotten 100 points. The difference between 100 points and 60 points is 40 points. For each question, the difference between getting it right and wrong is 8 points. Therefore Raj got 5 questions wrong. 40/8=5


 

 
    
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