Quantitative Aptitude - Arithmetic Ability Questions

Find the unit place digit in 192102 + 193103

What are the co­ordinates of the centroid of a triangle, whose vertices are A(­2,­5), B(4,­4) and C(7,3)?

If x2-3x+1=0, then x+1x is (x≠0)

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

The distance between the tops of two building 38 metres and 58 metres high is 52 metres. What will be the distance (in metres) between two buildings?

If Sinx = 4/5, then Sec2x - 1 = ?

In what ratio does the point T(x,0) divide the segment joining the points S(-4,-1) and U(1,4)?

If x = a + 1a, y = a - 1a ,(a>0), then the value of x4+y4-2x2y2 is