Quantitative Aptitude - Arithmetic Ability Questions

A mason can build a wall in 18 hours. After 9 hours he takes a break. What fraction of the wall is yet to be built?

In an alloy, aluminium and tin are in the ratio of 4 : 5. In the second alloy, the ratio of same elements is 4 : 7. If equal quantities of these two alloys be mixed to form a new alloy, then what will be the ratio of both of these elements in the new alloy?

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

What is the value of (cosecA - cotA) / (secA + tanA)?

If aq-r+br-p-cp-q, then find the value of (pa + qp + rc) is

What will be the roots of the quadratic equation x2 - 25x + 156 = 0?

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

Product of digits of a 2-digit number is 27. If we add 54 to the number, the new number obtained is a number formed by interchange of the digits. Find the number.