Quantitative Aptitude - Arithmetic Ability Questions

If a + b = 1, then a4 + b4 - a3 - b3 - 2a2b2 + ab is equal to

3cosA is equal to

If XY = a+23 and YX = 13, then find the value of X2 + Y2X2 - Y2.

The length of one side and the diagonal of a rectangle are 7 cm and 25 cm respectively. Find its area (in cm²)

In what ratio is the segment joining points (2, 3) and (-2, 1) divided by the Y-axis?

The ratio of salary of X, Y and Z is 15 : 3 : 8. If Z gets Rs. 3960 more than Y, then what is the salary (in Rs.) of X?

Calculate the principal if an amount of Rs. 441 is received on compound interest at the rate of 5% per annum after 2 years.

If the selling price is Rs 1680 after getting a discount of 16%, what was the marked price?