Quantitative Aptitude - Arithmetic Ability Questions

The average of 17 results is 60. If the average of first 9 results is 57 and that of the last 9 results is 65, then what will be the value of 9th result?

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?

The average revenues of 7 consecutive years of a company is Rs 83 lakhs. If the average of first 4 years is Rs 78 lakhs and that of last 4 years is Rs 90 lakhs, find the revenue for the 4th year.

The diagonal of a square is equal to the side of an equilateral triangle. If the area of the square is 15√3 sq cm, what is the area of the equilateral triangle?

In the given figure, the angle bisectors of B and C of an isosceles triangle intersect at point O. Find the angle BOC (in degree), when ∠ABC = ∠ACB = 75°.

Find the value of 'a' for which x+3x+a24 is a perfect square.

Find equation of the perpendicular bisector of segment joining the points (2,­6) and (4,0)?

72% of a number is 90. What is the number?