Quantitative Aptitude - Arithmetic Ability Questions

In each of the following questions two equations I and II are given. Solve both the equations and give answer:
$$\begin{gathered} I. x2+2x-195=0 \\ II. y2+30y+225=0 \end{gathered}$$

If (x – y) = 7, then what is the value of (x – 15)3 – (y – 8)3?

If cot2A = x, then x is

If xy = -18 and x2+ y2= 85, then find the value of (x + y).

The compound interest earned in two years at 15% per annum is Rs 20640. What is the sum invested (in Rs)?

At 13% discount the selling price of a oven is Rs 18000, what is the selling price if the discount is 27.5%?

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

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