Quantitative Aptitude - Arithmetic Ability Questions

A milkman purchases the milk at Rs. x per litre and sells it at Rs. 2x per litre still he mixes 2 litres water with every 6 litres of pure milk. What is the profit percentage?

In an election only two candidates contested 20% of the voters did not vote and 120 votes were declared as invalid. The winner got 200 votes more than his opponent  thus he secured 41% votes of the total voters on the voter list. Percentage votes of the defeated candidate out of the total votes casted is:

Select the odd figure one out the given series.

$$\begin{gathered} 0.33 + 0.23 0.3 - 0.22 = ? \\ \end{gathered}$$

The area of a circle is 616 sq.cm. Find its radius (in cm).

Simplify : (27)-23

If (x- 7)2 + (y + 10)2 + (z - 6)2 = 0, then find the value of x + y+ z.

Given w = -2, x = 3, y = 0 & z = -1/2, find the value of w2(z2 + y2)