Alligation or Mixture problems
From a cask of wine, containing 64 liters, 8 liters are drawn out and the cask is filled up with water. If the same process is repeated a second, then a third time, what will be the number of liters of wine left in the cask?

42 1 kg 8
42 7 kg 8
42 3 kg 8
48 7 kg 8

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Alligation or Mixture problems
A mixture of 150 liters of wine and water contains 20% water. How much more water should be added so that water becomes 25% of the new mixture?

10 liters
40 liters
20 liters
30 liters

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