Quantitative Aptitude - Arithmetic Ability Questions

In an examination 65% students pass in history and 55% students pass in hindi. If 5% students failed in both the subjects, then what is the percentage of students who have passed in both the subjects?

The ratio of the number of marbles that Pulak and Menaja had was 5:9 while the ratio of the number of marbles that Jairam and Menaja had was 7:18. What is the ratio of the number of marbles that Pulak and Jairam had?

If a = 299, b = 298, c = 297 then the value of 2a3 + 2b3 + 2c3 - 6abc is

The rate of simple interest per annum at which a sum of money double itself in 16 2/3 yrs is

An equilateral triangle ABC is inscribed in a circle of radius 20√3.
What is the length of the side of the triangle?

The radius of a sphere and hemisphere are same. The ratio of their total surface area is

The cost price of an article is x. It is marked up by 150%. It is sold at Rs 600 after giving 40% discount. What is x (in Rs)?

In the given figure, AB = 30 cm and CD = 24 cm. What is the value (in cm) of MN?