Quantitative Aptitude - Arithmetic Ability Questions

What is the reflection of the point (6, -3) in the line y = 2?

The difference between simple and compound interests compounded annually on a certain sum of money for 2 years at 18% per annum is Rs 81. The sum is ____.

If ( x - 5)2 + (y - 2)2 + (z - 9)2 = 0, then value of (x + y - z) is

What is the value of xy if x - y = 3 and x2+y2=15?

Twenty one times of a positive number is less than its square by 100. The value of the positive number is

If 177 is divided into 3 parts in the ratio 1/2 : 2/3: 4/5, then the second part is

Breadth of a rectangle is equal to the diagonal of the square whose side is 2.5√2 cm. Ratio between length and breadth of rectangle is 3 : 1. Find the area of the rectangle (in cm2).

The mean of 12 observations is 15. One more observation is included and the new mean becomes 16. The 13th observation is