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

Option 1: 10

Option 2: 30

Option 3: 20

Option 4: 40

Question : The difference between the largest and the smallest angles of a triangle whose angles are in the ratio of 5 : 3 : 10 is:

Option 1: 20°

Option 2: 30°

Option 3: 50°

Option 4: 70°

Question : Riya could not decide between a discount of 30% or two successive discounts of 25% and 5%, both given on shopping of INR 3,840. What is the difference between both the discounts?

Option 1: INR 44

Option 2: INR 48

Option 3: INR 42

Option 4: INR 46

Question : A certain sum of money lent at simple interest amounts to INR 1,200 in 2 years and INR 1,600 in 4 years. The rate percentage per annum is:

Option 1: 20%

Option 2: 30%

Option 3: 25%

Option 4: 16%

Question : Salaries of B, C, D, and E are in the ratio of 2 : 3 : 4 : 5 respectively. Their salaries are increased by 20%, 30%, 40% and 50% respectively. If the increased salary of D is INR 560, then what is the sum of the original salaries of B, C, D, and E?

Option 1: INR 1,400

Option 2: INR 1,560

Option 3: INR 1,820

Option 4: INR 1,260