Finding square roots of numbers that aren't perfect squares without a calculator

There are a number of ways to calculate square roots without a calculator. Here is guess and divide method. Step–1: Estimate/find a ... Read more »

Extracting Cube Roots Mentally

A cube is a number multiplied by itself twice more. For example, 3 cubed (3 3 ) is 3×3×3, or 27. A cube root is the number that, when cube... Read more »

How to know or check if a number is a perfect cube?

We often need to know or check if a number is a perfect cube in order to extract the cube root of the number within a very short time, espe... Read more »