Question : Solve the following expression.
$50-[20+(30-(25-5))]$

Option 1: 10

Option 2: 30

Option 3: 20

Option 4: 40

Question : Of the three numbers whose average is 40, the first is $\frac{1}{3}$rd of the sum of the other two. What is the first number?

Option 1: 20

Option 2: 50

Option 3: 25

Option 4: 30

Question : The third proportion to 25 and 35 is:

Option 1: 35

Option 2: 49

Option 3: 40

Option 4: 25

Question : A bag contains INR 550 in the form of 50 p, 25 p, and 20 p coins in the ratio 2 : 3 : 5. The difference between the amounts that are contributed by the 50 p and the 20 p coins is:

Option 1: INR 30

Option 2: INR 20

Option 3: INR 10

Option 4: INR 0

Question : What is the ratio of the mean proportional between 1.6 and 3.6 and the third proportional of 5 and 8?

Option 1: 2 : 15

Option 2: 5 : 16

Option 3: 3 : 16

Option 4: 4 : 15