The average of 30 numbers is 15. The average of the first 18 numbers is 10 and that of the next 11 numbers is 20. The last number is

If $$ {1\over3} ({12x\over5}-{1\over2})+{6\over5}={7\over6}$$ then what is the value of x?

The least number, which is a perfect square and is divisible by each of the numbers 16, 20 and 24 is 

The value of 24 ÷ 4 ×(3 +3) ÷2 is:

A can finish work in 18 days and B in 36 days. If they work on it together for 9 days, what percent of work is left?

What is the sum of all three-digit numbers which are divisible by 20?

Directions: Study the following table carefully to answer the questions that follow .
Number of soldiers ( in thousands ) joining five different forces during six different.

Total number of soldiers joining BSF in the years 2004, 2005 and 2006 was approximately what percent of the total number of soldiers joining Navy over all the years together? 

Given k = -3. Find the value of $$ {k^3+3k}$$.