List of top Quantitative Aptitude Questions on Mixtures & Alligations asked in NIFT

The milk and water in a mixture are in the ratio 7:5. When 15 litres of water is added to it, the ratio of milk and water in the new mixture becomes 7:8. The total quantity of water in the new mixture is:
A milkman has 3 vessels containing 67 litres, 139 litres, and 187 litres, respectively, of pure milk. A measuring jar, after a different number of exact measurements of milk in each vessel, leaves the same amount of milk unmeasured in each vessel. What is the volume of the largest such jar?
Two mixtures A and B contain milk and water in the ratio 4:5 and 7:4, respectively. In what ratio should the two mixtures be mixed to obtain a new mixture having 55% milk?