The mode and median of the data 8, 6, 8, 7, 8, 6, 8, 7, 6 is

If 8, X and 50 are in continued proportion, then the value of x is

Pipes A and B can fill a tank in 16 hours and 24 hours, respectively, and Pipe C alone can empty the full tank in x hours. All the pipes were opened together at 10:30 a.m, but C was closed at 2:30 p.m. If the tank was full at 8:30 p.m on the same day, then what is the value of x?

What is the Area of the given Field book.

In an election between two candidates, the candidate getting 60 % of the votes polled, is elected by a majority of 14, 000 votes. The number of votes obtained by the winning candidates is 

The x - intercept on the graph of 7x - 3y = 2 is :

There is 40 % increase in an amount in 8 years at simple interest. What will be the compound interest  (in rupees) of Rs 30000 after 2 years at the same rate? 

What will come in place of the question mark (?) in each of the following series?

15     18    16   19     17    20    ?