Quantitative Aptitude - Arithmetic Ability Questions

Select the odd word/letters/number/number pair from the given alternatives.

From a point P on a level ground , the angle of elevation to the top of the tower is 30° . If the tower is 100m high , the distance of point P from the foot of the tower is ( Take √3 = 1.73)

What is the difference of the cube and square of the common root of (x2 – 8x + 15) = 0 and (y2 + 2y – 35) = 0?

ΔXYZ is right angled at Y. If cosX = 3/5, then what is the value of cosecZ ?

α and β are the roots of the quadratic equation x2 – x – 1 = 0. What is the value of α8 + β8?

What is the altitude of an equilateral triangle whose side is 12 cm?

A car covers the first 30 km at a speed of 60 kmph and the next 20 km at 80 kmph. Find the average speed.

If the selling price of an article is doubled, then its loss percentage gets converted into the equal profit percentage. What is the loss percentage?