Quantitative Aptitude - Arithmetic Ability Questions

The number of sides of a regular polygon whose exterior angles are each 72 deg is

If ABCD is a Cyclic Quadrilateral, then the value of Cos2A - Cos2B - Cos2C + Cos2D is

The triangle in which the orthocenter, circumcentre, Incenter and the centroid coincide each other at a point is known as _____________.

 In ΔDEF measure of angle E is 90 deg. If tanD = 4/3, and DE = 6cm, then what is the length (in cm) of side EF?

ΔDEF is right angled at E. If m∠F = 30 deg, then find the value of (sinD - 1/3).

If Rs. 87 was divided between James and Radha in the ratio 1: 2, how much money did Radha get?

n an alloy, lead and tin are in the ratio of 2 : 3. In the second alloy, the ratio of same elements is 3 : 4. If equal quantities of these two alloy are mixed to forma new alloy, then what will be the ratio of these two elements in the new alloy? 

The rate of discount on an article whose marked price is Rs. 170 and selling price is Rs. 130?