Quantitative Aptitude - Arithmetic Ability Questions

The angles of elevation of the top of a tree 220 meters high from two points lie on the same plane are 30° and 45°. What is the distance (in metres) between the two points?

If x+y+z = 1, 1/x + 1/y + 1/z = 1 and xyz = -1, then x3+y3+z3 is equal to

If the radius of a circle is increased by 31% its area increases by ______.

In the given figure, OX, OY and OZ are perpendicular bisectors of the three sides of the triangle. If QPR = 65 deg and PQR = 60 deg, then what is the value (in deg) of QOR + POR ?

If a = 1/a-5, then the value of a + 1/a = ?

If 1/(cosecA ­ cotA) = x, then the value of x is

A bag has Rs 43 in the form of 5-rupee, 50-paise and 10-paise coins in the ratio of 1:5:11. What is the total number of 50-paise coins?

Selling price of an article is Rs 1144. If loss percentage is 12%, then what is the cost price (in Rs) of article?