Quantitative Aptitude - Arithmetic Ability Questions

If 9x - 6(3 - x) = 12, then the value of x is

If (x - 13)2 + (y - 4)2 = 0, then the value of y + xy - x ?

Two students appeared for an examination. One of them secured 26 marks more than the other and his marks were 75% of the sum of their marks. The marks obtained by them are

A shopkeeper sells wheat at a profit of 20% and for weighing uses a weight which is 10% less than the actual weight. What is his total profit percentage?

ΔPQR is right angled at Q. If cotP = 5/12, then what is the value of tanR ?

If x = x2+11 2 - 2, then x3 + 5x2 + 12x is

If M = 0.1 + (0.1)2 + (0.01)2 and N = 0.3 + (0.03)2 + (0.003)2, then what is the value of M + N?

Factorise x2 + 3x -­ 18