Quantitative Aptitude - Arithmetic Ability Questions

What is the simplified value of 12-13 ?

The co-ordinates of the centroid of a triangle ABC are (3,-2). What are the co-ordinates of vertex C if co-ordinates of A and B are (-2,5) and (6,-2) respectively?

In the following question, select the odd number group from the given alternatives.

If the amount received at the end of 2nd and 3rd year at Compound Interest on a certain Principal is Rs 24200, and Rs 26620 respectively, what is the rate of interest?

What is the value of x4+y4 when the value of x3+y3=8 and x+y=2 ?

What is the value of xy if x - y = 3 and x2+y2=15?

All sides are congruent in a _____.

What is the value of Tan 45° - 1/√3 Sec 60°?