Quantitative Aptitude - Arithmetic Ability Questions

The mean of the data 1, 1/2, 1/2, 3/4, 1/4, 2, 1/2, 1/4, 3/4 is

After buying a toy for Rs. 66, Raghu managed to sell it at a profit of 15%. The selling price of the toy was

If PA and PB are two tangents to a circle with centre O such that ∡APB = 80°. Then ∡AOP = 

In the following question, select the related number from the given alternatives.
 
47 : 57 : : 93 : ?

If a+b+c=15 and 1a+1b+1c=71abc, then the a3+b3+c3-3abc is

Which of the following numbers is not a prime number?

To get number 40, the number 56/9 should be multiplied with

Calculate the simple interest if Rs. 1800 is invested for 10 years at a rate of 5% per annum.