Quantitative Aptitude - Arithmetic Ability Questions

One of four words is a class of which the other three belong. Identify the class.

Number of circles that can be drawn through three non-colinear points is

What is the measure of an interior angle of a regular dodecagon?

If tan (5x ­- 10°) = cot (5y + 20°), then the value of x + y is

Two equal circles of radius 3 cm each and distance between their centres is 10 cm. The length of one of their transverse common tangent is

If the volume of a cylinder is 385 cubic cm and height is 10 cm, find its radius?

What is the obtuse angle formed by the hands of a clock when the time in the clock is 2:30?

In the following question, four groups of three numbers are given. In each group the second and third number are related to the first number by a Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.