Quantitative Aptitude - Arithmetic Ability Questions

A sum of Rs 10000 becomes Rs 14641 when invested at compound interest at the yearly interest rate of 20% per annum. If the compounding is done half yearly, then for how many years was the sum invested?

Find co-ordinates of the mid point of the segment joining points C (3,-5) and D (-7,3).

What will be the value of r2+p2+s2-rp-ps-rs when r = 4, p = 2, s = 8?

A circle and a square have same area. The ratio of the side of the square to the radius of the circle will be:

What will be the sum of the measures all the interior angles of a polygon having 14 sides?

In a mixture of 25 litres, the ratio of milk to water is 4:1. Another 3 litres of water is added to the mixture. The ratio of milk to water in the new mixture is

A money lender lends Rs. 400 for 3 years to a person and lends Rs. 500 for 4 years to the other person at the same rate of simple interest. If altogether he receives Rs. 160 as interest, what is the rate of interest per annum ?

The average marks obtained by a group of 10 students were 20. One student left the group as a result of which the average of the remaining students rose to 21. But another student joined, as a result of which the average marks of the group dropped a bit and became 20.6. What were the average marks obtained by the student who left and the one who joined?