Quantitative Aptitude - Arithmetic Ability Questions

When a number is increased by 42, it becomes 121% of itself. What is the number?

What is the value of 9991 x 10009?

If x + [1/(x + 7)] = 0, then what is the value of x – [1/(x + 7)]?

The ratio of the volume of two cylinders is 7 : 3 and the ratio of their heights is 7 : 9. If the area of the base of the second cylinder is 154 sq. cm, then what will be the radius (in cm) of the first cylinder?

In the given figure, the length of arc BC of the given circle is 44 cm. If O is the centre of circle, then what is the radius (in cm) of the circle?

The height of a right circular cylinder is twice its radius of the base. If its height be 6 times its radius of the base, then the volume of the cylinder will be 539 cub.cm more. Assuming Π = 22/7, the height of the cylinder is

If the average age of four children is 12 years and the average age of these children and their fathers is 20 years, what is the age of the father?

A shopkeeper by selling 13 Titan watches, earns a profit equal to the selling price of 3 Titan watches. His profit percentage is