Which smallest number should be subtracted from 1000 so that results will be a perfect square? 

The digit in the unit's place of the number represented by (7⁹⁵ - 3⁵⁸) is: 

A is inversely proportional to square of B whereas directly proportional to C. Value of A was 27 when value of B was 4 and value of C was 6. Find the value of A when value of B will be 3 and value of C will be 8.

Let x be the least number divisible by 13, such that when x is divided by 4, 5, 6, 7, 8 and 12, the remainder in each case is 2. The sum of the digits of x is:

Which is the largest 3 digit number that is exactly divisible by 15, 25 and 30?

4⁶¹ + 4⁶² + 4⁶³ + 4⁶⁴ is divisible by: 

If the fractions $$ {9\over11}$$, $$ {7\over9}$$, $$ {5\over6}$$ and $$ {11\over13}$$ are arranged in ascending order, which one will be the fourth?

The arithmetic mean of the following data is .

23, 17,20,19,21