Quantitative Aptitude - Arithmetic Ability Questions

In the following question, four number pairs are given. The number on left side of (–) is related to the number of the right side of (–) with some Logic/Rule/Relation. Three are similar on basis of same Logic/Rule/Relation. Select the odd one out from the given alternatives.

If a retailer offers a discount of 32% on the marked price of his goods and thus ends up selling at cost price, what was the % markup price?

If 7x + 6y = 5xy and 10x ­- 4y = 4xy, then value of x and y is

What is the area (in sq cm) of a regular hexagon of side 6 cm?

If cotA = x, then the value of x is

The perimeter and the length of one of the diagonals of a rhombus is 34 cm and 8 cm respectively. Find the length of its other diagonal (in cm).

Point P is the midpoint of segment AB. Co-ordinates of P are (5,-4) and A are (7,0). What will be the co-ordinates of point B?

What is the value of [1 – sin (90 – 2A)] / [1 + sin (90 + 2A)]?