Quantitative Aptitude - Arithmetic Ability Questions

The area of a circle is 38.5 cm2. Find its circumference (in cm).

In what ratio must a mixture of 11% sugar strength be mixed with that of 25% sugar strength so as to get a new mixture of 13% sugar strength?

What is the equation of the line which has 3/2 and -­4/7 as x and y intercept respectively?

An equilateral triangle has sides of 10 cm each. Find the ratio of in-radius to the circum-radius of the triangle.

What is the value of a2 + b2a3 - b3, when a + b = 8 and a - b = 2?

Find the value of 6732.8 + 673.28 + 67.328 + 6.7328 + 0.67328 ?

The surface area of a sphere is 5544 sq.cm. Find its diameter (in cm).

A chord of a circle is equal to its radius. A tangent is drawn to the circle at an extremity of the chord. The angle between the tangent and the chord is