Squares of all integers are known as perfect squares. In this lesson, we will discuss a very interesting Mathematical shortcut: How to chec...

Situation when we need to calculate the percentages in our mind are quite common. While calculating the VAT, Insurance premium or Tips at ...

Here is a nifty way to find remainder on diving numbers: Remainder on dividing by 3 To find the remainder of a number divided by 3, ...

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

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...

Ask someone to write a number, say a 5-digit number. (Can be a 2-digit.....3-digit.....4-digit....etc...…). Suppose the number written...

The cube of a number is that number multiplied by itself twice. For example, 5 cubed - denoted as 5 3 ; is equal to 5×5×5 = 125. The tech...

Finding the square root of a number is the inverse operation of squaring that number. Remember, the square of a number is that number times...

The word Digit means the single figure number; the numbers from 1 to 9 and zero. In mathematics, the digit sum of a given integer is the s...

Tell the age of people (between 1 and 63) from the cards they pick. An easy prediction trick that you can carry around in your wallet....