Quantitative Aptitude - Arithmetic Ability Questions

Mahesh buys a watch of Rs 300 and sells it. Mahesh gives two successive discount of 15% and 6% to the buyer. What will be the selling price (in Rs) ofthe watch?

The sum of the ages of husband and wife at present is 56. Ten years ago the product of their ages was 320. What is the age of the husband and the wife?

Convert the 0.0068 in to vulgar fraction:

The cost of levelling a circular field at 50 Paise per square metre is Rs 7700. The cost (in Rs) of putting up a fence all round it at Rs 1.20 per meter is ( Use π = 22/7)

If A : B = 1 : 4 and B : C = 2 : 3, then what is A : B : C?

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 the length of the side of an equilateral triangle is 8 cm, what is its area?

The sum of a non-zero number and 4 times its reciprocal is 17/2. What is the number?