Quantitative Aptitude - Arithmetic Ability Questions

If 4r = h + r2+h2 then r: h = ? (r not equal to 0)

The traffic lights at four different road crossings change after every 15 sec, 18 sec, 27 sec and 30 sec respectively. If they all change simultaneously at 6:10:00 hours, then at what time will they again change simultaneously?

If tan(A/2) = x, then the value of x is

sinA/(1 + cos A) is equal to

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

In the last financial year, a car company sold 41,800 cars . In this year, the target is to sell 51,300 cars . By what percent must the sale be increased ?

In the following question, select the odd letter/letters from the given alternatives.

Two identical hemispheres of maximum possible size are cut from a solid cube of side 14 cm. The bases of the hemispheres are part of the two opposite faces of cube. What is the total volume (in cm3) of the remaining part of the cube?