Quantitative Aptitude - Arithmetic Ability Questions

ax + 5y = 8 has slope of -4/3. What is the value of a?

The base of a parallelogram is twice its height. If the area of the parallelogram is 338 sq.cm. Find its height?

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

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

In the given figure, radius of a circle is 14√2 cm. PQRS is a square. EFGH, ABCD, WXYZ and LMNO are 4 identical squares. What is the total area (in sq.cm) of all the small squares ?

Simple interest on a sum for 12 months at the rate of 25% per annum is Rs 935.What is the value (in Rs) of sum?

A mason can build a wall in 70 hours. After 7 hours he takes a break. What fraction of the wall is yet to be built?

Find the L.C.M of 4/5, 2/3 and 5/7.