Quantitative Aptitude - Arithmetic Ability Questions

If x = (a/b) + (b/a), y = (b/c) + (c/b) and z = (c/a) + (a/c), then what is the value of xyz – x2 – y2 – z2?

Which of the following quadratic equations has real roots?

3cosA is equal to

Find the odd letters from the given alternatives.

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

The largest chord of the circle has a length of 20.4 cm. The radius of the circle will be_____.

Some masons promised to do a work in 10 days but 8 of them were absent and remaining did the work in 18 days. What was the original number of masons?

A mixture contains liquid A and liquid B in the ratio of 5 : 4. If 2 litres of liquid B is added to it, then the ratio of liquid A and liquid B becomes 7 : 6. What is the quantity (in litres) of liquid A in the mixture?