Mix 3 Chapters (Average)

A container contains 40 litres of milk. From this container 4 litres of milk was taken out and replaced by water. This process was repeated further two times. How much milk is now contained by the container?

• 26 litres

• 28 litres

• 28.56 litres

• 29.16 litres

A merchant has 1000 kg of sugar, part of which he sells at 8% profit and the rest at 18% profit. He gains 14% on the whole. The quantity sold at 8% profit is:

• 480 kg

• 560 kg

• 600 kg

• NOTA

In what ratio must a person mix three kinds of wheat costing him Rs 1.20,Rs 1.44 and Rs 1.74 per Kg so that the mixture may be worth Rs 1.41 per Kg?

• 11:77:7

• 25:45:8

• 27:23:6

• 11:45:7

A 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?

• 50

• 30

• 40

• 55

The number of natural numbers of two or more than two digits in which digits from left to

right are in increasing order is :

• 127

• 128

• 502

• 501

Two solutions of 90% and 97% purity are mixed resulting in 21 litres of mixture of 94%

purity. How much is the quantity of the first solution in the resulting mixture?

• 15 litres

• 12 litres

• 9 litres

• 6 litres

The remainder, when (15²³ + 23²³) is divided by 19, is :

• 4

• 15

• 0

• 18

Let N = 55³ + 17³ – 72³. N is divisible by:

• Both 7 and 13

• Both 3 and 13

• Both 17 and 7

• Both 3 and 17

What number has a 5:1 ratio to the number 10?

• 42

• 55

• 62

• 50

The third proportional to 16 and 36 will be:

• 9

• 27

• 45

• 81