Quantitative Aptitude - Arithmetic Ability Questions

The total surface area of a hemisphere is 462 sq.cm. Find its diameter (in cm).

The chord AB of a circle of centre O subtends an angle θ with the tangent at A to the circle. Then measure of∠ABO is

The average of 12 numbers is 9. If each number is multiplied by 2 and added to 3, the average of the new set of numbers is

If the standard deviation of a population is 4.5, what would be the population variance?

Select the odd word/letters/number/number pair from the given alternatives.

Choose the one which is different or odd from the following options?

A right-angled triangle ABC is right-angled at B, and tan A = 4/3. If AC = 25 cm, the length of BC is

In a circle with centre O, AB is a diameter and CD is a chord which is equal to the radius OC. AC and BD are extended in such a way that they intersect each other at a point P, exterior to the circle. The measure of ∠APB is