Quantitative Aptitude - Arithmetic Ability Questions

What are the co­-ordinates of the mid point of the segment joining points C(0,­-3) and D(8,5)?

 What is the value of (cosec45 + √3/2) ?

What is the slope of the line perpendicular to the line passing through the points (8,­2) and (3,­1)?

If (tanA + tanB)/(1 ­ tanAtanB) = x, then the value of x is

If (-1/2) * ( x - 5) + 3 = -5/2, then what is the value of x?

Select the odd word/letters/number/number pair from the given alternatives.

In the following question, four number pairs are given. The number on left side of (–) is related to the number on 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.

By selling a used phone for Rs.6,160 Rajan got 44% less than what it cost him to buy it a few years ago. At what price should Rajan have been able to sell it to make a profit of 5%?