If x -­ y = ­7 and x + y = 13, then x2 - y2 is

If sin ­-330° = x, then the value of x is

If Giri's salary is 9/5 times of Hariprasad's and Shaukat's is 9/2 times of Hariprasad's, what is the ratio of Giri's salary to Shaukat's?

If 3x -­ 7 = 5x ­- 1, then the numerical value of (x ­- 4)2 is 

A shopkeeper by selling 23 Lotto shoes, earns a profit equal to the selling price of 7 Lotto shoes. His profit percentage is

If the radius of a circle is increased by 29% its area increases by

Slope of the side DA of the rectangle ABCD is 1/3. What is the slope of the side AB?

If the amount received at the end of 2nd and 3rd year at Compound Interest on a certain Principal is Rs 33708, and Rs 35730.48 respectively, what is the rate of interest?