Problem Solving MCQ Set 16

Question: How many kgs of Basmati rice costing Rs.42/kg should a shopkeeper mix with 25 kgs of ordinary rice costing Rs.24 per kg so that he makes a profit of 25% on selling the mixture at Rs.40/kg?

1. 20 kgs
2. 12.5 kgs
3. 16 kgs
4. 200 kgs

Question: How many litres of a 12 litre mixture containing milk and water in the ratio of 2 : 3 be replaced with pure milk so that the resultant mixture contains milk and water in equal proportion?

1. 4 litres
2. 2 litres
3. 1 litre
4. 1.5 litres

Question: A sample of x litres from a container having a 60 litre mixture of milk and water containing milk and water in the ratio of 2 : 3 is replaced with pure milk so that the container will have milk and water in equal proportions. What is the value of x?

1. 6 litres
2. 10 litres
3. 30 litres
4. None of these

Question: zookeeper counted the heads of the animals in a zoo and found it to be 80. When he counted the legs of the animals he found it to be 260. If the zoo had either pigeons or horses, how many horses were there in the zoo?

1. 40
2. 30
3. 50
4. 60

Question: From a cask of milk containing 30 litres, 6 litres 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 litres of milk left in the cask?

1. 0.512 liters
2. 12 liters
3. 14.38 liters
4. 15.36 liters

Question: In a km race, A gives B a start of 20 seconds and beats him by 40m. However, when he gives B a start of 25 seconds they finish in a dead heat. What is A's speed in m/sec?

1. 12.5 m/sec
2. 20 m/sec
3. 8 m/sec
4. 10 m/sec