Quantitative Aptitude - Arithmetic Ability Questions

If 3+12=x+3y, then the x+y is 

If the value of √30  is approximately 5.477, then what is the approximate value of 56 ?

In the following question, select the odd letter pair from the given alternatives.

The distance between the tops of two building 38 metres and 58 metres high is 52 metres. What will be the distance (in metres) between two buildings?

Find the odd word/letters/number from the given alternatives.

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

What is the value of (4/3) cot2 (p/6) + 3 cos2 (150) – 4 cosec2 45 + 8 sin (p/2)?

What is the value of Tan 45° - 1/√3 Sec 60°?