Quantitative Aptitude - Arithmetic Ability Questions

The length of the common chord of two intersecting circles is 12 cm. If the diameters of the circles are 15 cm and 13 cm, then what is the distance (in cm) between their centers?

The point equidistant from the vertices of a triangle is called its

What is the value of [1/(1 – tan θ)] – [1/(1 + tan θ)]?

The fraction from the ones listed below that will NOT lead to a recurring decimal is

A, B and C can do a job working alone in 12, 16 and 24 days respectively. In how many days they can do the job if they worked together?

 What is the value of (cosec45 + √3/2) ?

What is the simplified value of 0.042+0.212-0.00840.043+0.213

If a3 + b3 + c3 - 3abc = 0, then the value of a2/bc + b2/ac - 3.