Quantitative Aptitude - Arithmetic Ability Questions

Two circles are having radii 9 cm and 12 cm. The distance between their centres is 15 cm. What is the length (in cm) of their common chord?

For the data given below. find the sum of mode. median and mean.6, 3, 8, 4, 3, 11, 7, 4, 5, 4.

The average of marks obtained by 100 candidates in a certain examination is 30. If the average marks of passed candidates is 35 and that of the failed candidates is 10, what is the number of candidates who passed the examination?

The lengths of the two diagonals of a rhombus are 5 cm and 12 cm. Find its area (in cm2)

What is the third proportional to 10 and 20?

If cos 135° = x, then the value of x is

A bank offers 20% compound interest per half year. A customer deposits Rs 6000 each on 1st January and 1st July of a year. At the end of the year, the amount he would have gained by way of interest is

The selling price of an article is 8/5th of its cost price. Then the gain percentage is