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Note: They secure different marks in Science viz., 5, 16, 19, 20, 24, 36 and 57.The persons who is studying in 8th class secure only even number marks and the person who study 10th class secure only Odd number marks. The sum of marks secure by H and W is more than 90 marks.(H/W=57/36) Q and D only studying in class 7. ( Q and D secure = 5/19 marks) Q secure more marks than D. So Q secure 19 marks and D secure 5 marks. A Secured less than 30 marks and studies with W. A secure more marks than G. So A secure either 20 or 24. A and E studying in different class. G and W studying in the same class. A and H studying in different class. A is junior to H. From this E and H studying in class 5. A, G and W are studying in class 6. The mark scored by E is not a multiple of 5. E and G secure a mark which is a multiple of 4. So the final arrangement becomes
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