Quantitative Aptitude - Arithmetic Ability Questions

If 2x-12x = 5, then what is the value x2 + 116x2 - 2

If the value 5 = 2.236,then calculate the value of 405 - 1280-125

What is the value of sin ­7π/4c?

Diameter of a car wheel is 21 cm. A car driver moving at the speed of 66 km/hr takes 36 seconds to reach a destination. How many revolutions will the wheel make during the journey?

Three pipe P, Q and R can fill a tank in 12 minutes, 18 minutesand 24 minutes respectively. The pipe R is closed 12 minutesbefore the tank is filled. In what time the tank is full?

For what sum will the simple interest at R% for 2 years will be R?

In ΔPQR, S and T are points on side PQ and PR respectively. ST is parallel to QR. If lengths of PS, SQ and PR are 6 cm, 9 cm and 12.5 cm respectively, what is the length of TR?

The total surface area of a hemisphere is 4158 cm2. Find its diameter (in cm).