Quantitative Aptitude - Arithmetic Ability Questions

An equilateral triangle of area 300 cm2 is cut from its three vertices to form a regular hexagon. Area of hexagon is what percent of the area of triangle?

If after giving a discount of 18%, a book is sold for Rs 1599, then what will be the marked price (in Rs) of the book?

What is the sum of the first 12 terms of an arithmetic progression if the first term is 3 and last term is 47?

If (36 - 16x) - (4x - 8) = 4, then the value of x is

If ax + by = 1 and bx + ay = 2aba2+b2 then x2+y2a2+b2 is equal to

If √(1+tan2A) = x, then the value of x is

If (tanA ­- tanB)/(1 + tanAtanB) = x, then the value of x is