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

If 7 + 3x ≥ 5 ­- x/2 and 2x + 3 ≤ 5 -­ 2x; then x can take which of the following values?

A number exceeds its 1/6 by 30. What is the number?

What is the value of [2 cot × (p – A)/2]/[1 + tan2× (2p – A)/2]?

Find equation of the perpendicular bisector of segment joining the points (2,-5) and (0,7)?

If the number 247_679 is completely divisible by 9, then the smallest whole number in the place of the blank digit will be

­ A wooden bowl is in shape of a hollow hemisphere of internal radius 8 cm and thickness 1 cm. Find the total surface area of the bowl?

The mean of a distribution is 20 and the standard deviation is 4. What is the value of the coefficient variation?