The ratio of the monthly incomes of X and Y is 5: 4 and that of their monthly expenditures is 9: 7. If the income of Y is equal to the expenditure of X, then what is the ratio of the savings of X and Y?

If $$ A = {1\over 2}+{1\over 3}×{1\over 4}÷{1\over 5}-{1\over 6}$$ and $$B={1\over 2}÷{1\over 3}×{1\over 4}+{1\over 5} $$ , then what is the value of A - B?

 In a family, the average age of a father and a mother is 35 years. The average age of the father, mother and their only son is 27 years. What is the age of the son? 

Directions: The bar diagram given below shows the productions (in the unit of thousand pieces) of three types of biscuits by a company in the five consecutive years. Study the diagram and answer the following questions.

The percentage drop in the number of glucose biscuits manufactured from 1994 to 1995 is 

The curved surface area of a cylinder is five times the area of its base. Find the ratio of radius and height of the cylinder.

What should come in place of the question mark '?' in the following number series?

7, 13, ?, 49, 97, 193

In the given question, two equations numbered l and II are given. Solve both the equations and mark the appropriate answer.

I. x²+ 35x + 306 = 0

II. y² + 41y + 408 = 0

if  $${5x-{5\over x}+6=0}$$, then $$x^2+{1\over x^2}$$ is