Quantitative Aptitude - Arithmetic Ability Questions

Four numbers A, B, C and D are such that their overall average is 16. The average of A and B is 9.5. The average of C and D is

The ratio of angles of a triangle are 1 : 2/3 : 3. Then the smallest angle is

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

A bank offers 15% compound interest per half year. A customer deposits Rs 7200 each on 1st January and 1st July of a year. At the end of the year, the amount he would have gained by means of interest is

Two persons are on either side of a temple, 75 m high, observe the angle of elevation of the top of the temple to be 30 and 60 deg respectively. The distance between the persons is

O is the centre of a circle and AB is the tangent to it touching at B . If OB = 3 cm. and OA = 5 cm , then the measure of AB in cm

A cone of height 12 cm and diameter 10 cm is mounted on a hemisphere of the same diameter. What is the volume of the solid thus formed?