Quantitative Aptitude - Arithmetic Ability Questions

Find the area (in cm²) of a semi-circle of radius 21 cm.

If 5(4 - x) - 4 > 5x -2 > 2x - 6, then the value of x is

If (1 + sinA)/cosA + cosA/(1 + sinA) = x, then the value of x is

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

A mixture contains acid and water in the ratio of 7 : 3. If 4 litres of water is added to it, then the ratio of acid and water becomes 7 : 4. What is the quantity (in litres) of acid in the mixture?

A shop keeper cheats to the extent of 10% while buying and selling fruits, by using tampered weights. His total gain, in %, is:

The height of a tower is 50√3 m. The angle of elevation of a tower from a distance 50 m from its feet is

Simple interest on a sum of Rs 50200 for 3 months is Rs 1380.5. What is the rate (in percentage) of interest per annum?