Quantitative Aptitude - Arithmetic Ability Questions

If √x ­- √y = 1 , √x + √y = 17 then √xy = ?

What are the co­-ordinates of the mid point of the segment joining points C(0,­-3) and D(8,5)?

If a + b = 10 and ab- 13 = -ba - 11, then what is the value of 3ab + 4a2 + 5b2 ?

What are the co-ordinates of the centroid of a triangle, whose vertices are A(-2,5), B(3,-2) and C(5,3)?

A, B and C can work together for Rs. 550/- A and B together are to do 7/11 of the work. The share of C should be?

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

Find the odd word/letters/number from the given alternatives.

What is the reflection of the point (5, -2) in the line x = -1?