JEXPO 2013 Solved paper Mathematics 1. If A:B=2:5, B:C=8:11,C:D=11:12, D:E=13:14, then A:E is equal to- ANs.: If my calculation not wrong then answer should be 26:105 (no such options are given) 2. The average of three numbers is 135. The largest number is 180 and the difference of others is 25. The smallest number is Ans.: (A) 100 3. In a mixture of 45 liters, the ratio of milk and water is 3:2. The quantity of water that should be added to make the ratio 9:11 is Ans.: (B) 15 liters 4. A student multiplied a number x by 3/5 instead of 5/3. The error in the calculation is Ans.: (D) 64% 5. On selling a book for Rs.40, the loss is 20%. To make a profit of 40%, the book must be sold at Ans.: (D) Rs.70 6. If 8 carpenters can make 18 boxes in 3 days, 4 carpenters can make 18 boxes in Ans.:(A) 6 days 7. A factor of x 2 -x-600 is Ans.:(B) x-25 8. If 3x+1/4x=3 and x≠0 then the value of 64x 3 +1/27x 3 is Ans.: (D) 48 9. If a=√6 + √5 and ab=1, then the value of a 2 + b 2 is ...
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