Quantitative Aptitude - Arithmetic Ability Questions

What is the third proportional to 10 and 20?

In an alloy of German silver the ratio of copper to zinc was 17:7 while that of nickel to zinc was 4 :3. The ratio of copper to zinc to nickel in the alloy was

The difference between simple and compound interests compounded annually on a certain sum of money for 2 years at 5% per annum is Rs 45. The sum is

What are the roots of the quadratic equation: x2 + 3x ­- 154 = 0

Find the median, mode and mean of 9, 5, 8, 9, 9, 7, 8, 9, 8.

The sum of the ages of Rohit and Ankit is 78. Rohit's age is twice the age of Ankit. What is the age (in years) of Rohit?

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

What is that least number that must be added to the product 684 × 686 to make it a perfect square?