List of top Quantitative Aptitude Questions on Mixtures & Alligations

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?
In a factory, average salary of employees is 7,000. If the average salary of 12 officers is Rs. 40,000 and that of remaining employees is 6,000, the number of employees in the factory will be
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?
10 litres of concentrated acid containing 75% of acid and rest water is mixed with X litres of diluted acid containing 40% of acid and rest water. If the final mixture contains 60% of acid then value of X is:
A shopkeeper purchases 40 kg of rice at the rate of \(₹ 35\) per kg and \( 50\) kg of rice at the rate of \(₹ 40 \)per kg. If he sells the mixture to make a profit of \(20\%\), the corresponding selling price for this transaction is:
A vessel contained a solution of acid and water in which water was 64%. Four litres of the solution were taken out of the vessel and the same quantity of water was added. If the resulting solution contained 30% acid, then the quantity (in litres) of the solution, in the beginning in the vessel, was:
30 gm of sugar was mixed in 180 ml of water in a vessel A, 40 gm of sugar was mixed in 280 ml of water in vessel B, and 20 gm of sugar was mixed in 100 ml of water in vessel C. The solution in vessel B is:
A shopkeeper has two varieties of rice A and B. By selling A at ₹75 per kg, he loses 20%; and by selling B at ₹90 per kg, he gains 25%. If he mixes A and B in the ratio 4 : 5 and sells the mixture at ₹110.25 per kg, then his profit percentage is:
A shopkeeper has two varieties of rice A and B. By selling A at ₹75 per kg, he loses 20%; and by selling B at ₹90 per kg, he gains 25%. If he mixes A and B in the ratio 4 : 5 and sells the mixture at ₹110.25 per kg, then his profit percentage is:
Shikha sells an article for ₹253, after giving 12% discount on its marked price. Had she not given any discount, she would have earned a profit of 25% on the cost price. What is the cost price of the article?
A grocer mixes coffee powder of 2 types, one of which is priced at Rs.\ 60 and the other at Rs.\ 90. What should be the ratio of combining the two, to sell the blended mix coffee powder of the two types at Rs.\ 80?
A 20 litre vessel is filled with alcohol. Some of the alcohol is poured out into another vessel of equal capacity, which is then completely filled by adding water. The mixture thus obtained is then poured into the first vessel to capacity. Then \(6\frac{2}{3}\) litres is poured from the first vessel into the second. Both vessels now contain an equal amount of alcohol. How much alcohol was originally poured from the first vessel into the second?
Fresh grapes contain 90% water while dry grapes contain 20% water. What is the weight of dry grapes obtained from 20 kg fresh grapes?
A vessel is filled with liquid, 3 parts of which is water and 5 parts syrup. What part of the mixture should be drawn off and replaced with water so that the mixture contains half water and half syrup?