Quantitative Aptitude - Arithmetic Ability Questions

Marked price of an item is Rs 900. On purchase of 2 items discount is 6%, on purchase of 3 items discount is 12%. Rajani buys 5 items, what is the effective discount?

If ab+ba=1,then the value of a3+b3 is

If p/q = r/s = t/u = √5, then what is the value of [(3p2 + 4r2 + 5t2)/(3q2 + 4s2 + 5u2)]?

If θ is positive acute angle and 4sin2θ = 3, then the value of tan θ - cot θ/2 is

The area of an equilateral triangle is 25√3 sq.cm. Find its side (in cm).

If 4x - 7y = 3 and 2x - y = 9, then x - y is.

Simple interest on a sum for 5 years is equal to 20% of the principal. In how many years interest will be equal to the principal?

Circum center of ΔABC is O. If ∡BAC = 75 and ∡BCA = 80 degrees,

then what is the value of ∡OAC(in deg)?