Quantitative Aptitude - Arithmetic Ability Questions

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

The sum of 2xy(3x + 4y - 5z) and 5yz(2x - 3y) is

If x=2+3,then the value of x2-x+1x2+x+1 is

Which of the following is not a Triangular number?

If 1/4th of the wall is painted blue, 1/2 is painted yellow and remaining 3 m is painted white, what is the length of the wall?

In ΔABC measure of angle B is 90 deg. If cosA = 5/13, and AB = 10 cm, then what is the length (in cm) of side BC?

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

If A : B = 3 : 4 and B : C = 6 : 5 then A : (A + C) is