Quantitative Aptitude - Arithmetic Ability Questions

If x + y = 10 and xy = 4, then what is the value of x4 + y4?

The value of x13+x-13x23-1+x-23

For the inequation x^2–7x + 12 > 0, which one of the following is correct ?

Coefficient of x2 in (x + 9)(6 -­ 4x) is

In the given figure, O is the centre of the circle and QOR = 50 deg, then what is the value of RPQ (in deg) ?

If (5/9 of x) ­- (2/5 of 9/4) equals ­ -4/5 then find x.

A rectangular swimming pool of length 30 m and breadth 15 m has a uniformly sloping floor. It is 1 m in depth on one end of its length and 2 m at the other. How much water is needed to completely fill this pool?

Select the odd word/letters/number/number pair from the given alternatives.