Quantitative Aptitude - Arithmetic Ability Questions

In a camp 180 students had ration for 20 days. How many students should leave the camp if the ration should last for 25 days?

Among four students sitting in a row, average age of last three students is 20 years and the average age of first three students is 21 years. If the age of first student is 26 years, then what is the age (in years) of the last student?

The sum of present age of father and his son is 60 yrs. Six years ago, father's age was five times the age of the son. After 6 years, son's age will be?

Which one of the following is an irrational number?

A solid hemisphere has radius 14 cm. It is melted to form a cylinder such that the ratio of its curved surface area and total surface area is 2 : 3. What is the radius (in cm) of its base?

The circumference of a circle is 110 cm. Find its radius (in cm).

If 5x ­- 40 = 3x, then the numerical value of 2x -­ 11 is

In what ratio is the segment joining (12,­1) and (-­3,4) divided by the Y­-axis?