The difference between C.I and S.I for 2 years is Rs. 9. Find the sum (in Rs.) if the rate is 15% per annum.

ABCD is parallelogram. P and Q are the mid points of sides BC and CD respectively. If the area of ∆ABC is 12 cm² then the area of ∆APQ is 

Of the three numbers, the second is twice the first and it is also thrice the third. If the average of three numbers is 44, the difference of the first number and the third numbers is: 

The median of 31, 25, 17, 23, 45 and 59 is:

A and B can do a piece of work in 28 and 35 days respectively. They began to work together but A leaves after sometime and B completed remaining work in 17 days. After how many days did A leave? 

Which of the following represents a correct proportion?

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

The ratio between compound interest and simple interest for a certain amount is 43 : 40 for 2 years, the find the rate of interest.