Quantitative Aptitude - Arithmetic Ability Questions

Convert decimal number 101 to binary.

How many balls of radius 2 cm can be made by melting a bigger ball of diameter 16 cm? (Take π = 22/7)

An equilateral triangle of area 300 cm2 is cut from its three vertices to form a regular hexagon. Area of hexagon is what percent of the area of triangle?

If 4x2 - 12x + k is a perfect square, then the value of k is

The distance between two pillars is 120 metres. The height of one pillar is thrice the other. The angles of elevation of their tops from the midpoint of the line connecting their feet are complementary to each other. The height (in metres) of the taller pillar is (Use : √3 = 1.732)

What is the value of cot210°?

The value of (1 - √2) + (√2 - √3) + (√3 - √4) + ..... + (√15 - √16) is

The number of solutions of the pair of linear equations x + 2y - 8 = 0 and 2x + 4y = 16 is