Quantitative Aptitude - Arithmetic Ability Questions

If 2x-2x=1 (x≠0),then the value of x3-1x3 is

Points P , Q and R are on a circle such that ∠PQR = 40° and ∠QRP = 60° . Then the subtended angle by arc QR at the centre is

A can do a piece of work in 9 days while B can do it in 12 days. A and B together can do the work in

If θ be positive acute angle and 5cosθ + 12sinθ = 13, then the value of cosθ is

If cosecA - cotA = x, then the value of x is

What should be added to 5(2x-y) to obtain 4(2x - 3y) + 5(x + 4y)?

What are the co-ordinates of the centroid of a triangle, whose vertices are A(1, -5), B(4, 0) and C(-2, 2)?

The marked price of a book is Rs 4200. The shopkeeper gives two successive discounts of 25% and y% to the customer. If the customer pays Rs 2898 for the book, then what is the value (in percentage) of y?