If P is 15 years old now and Q will be 26 years old after 6 years, what is the ratio of their percentages? 

How may digit are required to write numbers from 1 to 50?

A six digit number is formatted by repeating a three digit number: for example, 256, 256 or 678, 678 etc. Any number of this form is always exactly divisible by:

If difference of cube and square of a number is 100 and difference of square and number is 20, then value of number is 

Product of digits of a 2-digit number is 27. If we add  54 to the number, the new number obtained is a number formed by interchange of the digits. Find the number.

Three pots contain equal mixture of milk and water in the ratio of 4: 1, 5: 2 and 6: 1 respectively. If all the solutions are mixed together. What is the ratio of milk and water in the final solution?

Line 2x + y = 3 and 3x - 2y = 1 meets X-axis at two two points. Find the distance between these points.

If the numerical value of the perimeter of an equilateral triangle is √3 times the area of it, then the length of each side of the triangle is: