Maths olympiad
Exam
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On a 26 question test, 5 points were deducted for each wrong answers and 8 points were added for right
answers. If all the questions were answered, How many were correct if the score was zero.
Read Solution (Total 5)
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- 10 q's correct
10*8-16*5=0 - 8 years agoHelpfull: Yes(1) No(0)
- 8x-5(26-x)=0
s0, x=10
hence 10 questions were answered correct - 7 years agoHelpfull: Yes(1) No(0)
- 16 wrong answer 10 right answer
- 7 years agoHelpfull: Yes(0) No(0)
- The No.(x) which is to be multiplied with 8 should be exactly divisible by 5 and x should less than 26.
there are 5 possibilities 5,10,15,20,25. here 5,15,20,25 wont balance the equation. so the answer is 10
8(10) - 5(26-10) = 0
where 26 is the total No. of question - 7 years agoHelpfull: Yes(0) No(0)
- 10 will be the answer.
since 10*8=80 and 16*5=80 since subtracting to one another the resultant will become zero. So 10 right question attempt and 16 wrong question attempt. - 7 years agoHelpfull: Yes(0) No(0)
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