Quantitative Aptitude - Arithmetic Ability Questions

Find the value of  y(y4 - y2 - y) when y = 5.

If the sum of a number and its reciprocal be 2, then the number is

A sum becomes 1.69 times of itself in 2 years when invested at compound interest. What is the per annum rate of interest (in percentage)?

If the side of the equilateral triangle is 8√3 cm, then what is the length (in cm) of the in radius of the triangle?

ΔPQR is right angled at Q. If cosP = 3/5, then what is the value of cosR ?

Two trains are moving in opposite directions with the same speed. If the length of each train is 144 metres and they cross each other in 9 seconds, then what is the speed (in km/hr) of each train?

Find the total surface area (in cm²) of a right circular cone of diameter 14 cm and slant height 10 cm.

Calculate the distance (in cm) of the chord from the centre of the circle, if the chord of length 48 cm is drawn in the circle of radius 25 cm.