Quantitative Aptitude - Arithmetic Ability Questions

The mean of a distribution is 15 and the standard deviation is 5. What is the value of the coefficient variation?

The length of the diagonal and the breadth of a rectangle are 26 cm and 10 cm respectively. Find its perimeter (in cm).

Two pipes X and Y can fill an empty tank in 16 hours and 20 hours respectively. Pipe Z alone can empty the completely filled tank in 25 hours. Firstly both pipes X and Y are opened and after 6 hours pipe Z is also opened. What will be the total time (in hours) taken to completely fill the tank?

Simple interest on a sum for 5 years is equal to 20% of the principal. In how many years interest will be equal to the principal?

In the first 40 overs of a 50 over innings, the run rate was 4.8 runs/over. What is the required run rate in the remaining 10 overs to reach the target of 241 runs?

The cube of 105 is

What approximate value should come in place of the question mark (?) in the following questions? (You are not expected to calculate the exact value.)

21.003 × 39.998 –209.91 = 126× ?

If x+19x=4, then 9x2+19x2 is