Quantitative Aptitude - Arithmetic Ability Questions

What is the compound interest earned on Rs 80,000 at 40% per annum in 1 year compounded quarterly?

Value of (cos 53° - sin 37°) is

If a - b = 10 and ab =-21, then what is the value of a3-b3 ?

In the given figure, PQR is a triangle and quadrilateral ABCD is inscribed in it. QD = 2 cm, QC = 5 cm, CR = 3 cm, BR = 4 cm, PB = 6 cm, PA = 5 cm and AD = 3 cm. What is the area in sq.cm of the quadrilateral ABCD?

What is the average of all natural numbers from 21 to 39?

What is the ratio of simple interest earned on certain amount at the rate of 12% p.a. for 9 years and that for 12 years?

In an examination, 35% of total students failed in Hindi, 45% failed in English and 20% failed in both. Find the percentage of those studnets who passed in both the subjects ?

In the given figure, ABC is a right angled triangle. ABC = 90 deg and ACB = 60 deg. If the radius of the smaller circle is 2 cm, then what is the radius (in cm) of the larger circle?