Quantitative Aptitude - Arithmetic Ability Questions

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 aLogic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.

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

If the diameter of a circle is 35 cm, then what will be its circumference (in cm)?

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

The midpoints of AB and AC of a triangle ABC are X and Y respectively. If BC+XY=12 units, then BC­XY is

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

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?

If a - b = 5 and a2 + b2 = 97, ab = ?