Square of 421

The square of a number is the product of the number itself. The square of 421 is 421 × 421. The square of a number always ends in 0, 1, 4, 5, 6, or 9. We write it in math as 421², where 421 is the base and 2 is the exponent. The square of a positive and a negative number is always positive. For example, 5² = 25; -5² = 25.

The square of 421 is 421 × 421 = 177,241.

Square of 421 in exponential form: 421²

Square of 421 in arithmetic form: 421 × 421

The square of a number is multiplying the number by itself. So let’s learn how to find the square of a number. These are the common methods used to find the square of a number.

1. By Multiplication Method
2. Using a Formula
3. Using a Calculator

In this method, we will multiply the number by itself to find the square. The product here is the square of the number. Let’s find the square of 421.

Step 1: Identify the number. Here, the number is 421.

Step 2: Multiplying the number by itself, we get, 421 × 421 = 177,241.

The square of 421 is 177,241.

In this method, the formula, a² is used to find the square of the number. Where a is the number.

Step 1: Understanding the equation Square of a number = a²

a² = a × a

Step 2: Identifying the number and substituting the value in the equation.

Here, ‘a’ is 421.

So: 421² = 421 × 421 = 177,241

Using a calculator to find the square of a number is the easiest method. Let’s learn how to use a calculator to find the square of 421.

Step 1: Enter the number in the calculator Enter 421 in the calculator.

Step 2: Multiply the number by itself using the multiplication button (×) That is 421 × 421

Step 3: Press the equal to button to find the answer Here, the square of 421 is 177,241.

Tips and Tricks for the Square of 421: Tips and tricks make it easy for students to understand and learn the square of a number. To master the square of a number, these tips and tricks will help students.

• The square of an even number is always an even number. For example, 6² = 36

• The square of an odd number is always an odd number. For example, 5² = 25

• The last digit of the square of a number is always 0, 1, 4, 5, 6, or 9.

• If the square root of a number is a fraction or a decimal, then the number is not a perfect square. For example, √1.44 = 1.2

• The square root of a perfect square is always a whole number. For example, √144 = 12.

• Prime number: A number that is only divisible by 1 and itself is a prime number. For example, 2, 3, 5, 7, 11, …

• Exponential form: Exponential form is a way of writing numbers using a base and an exponent, such as 421² where 421 is the base and 2 is the exponent.

• Square: The result of multiplying a number by itself. For example, the square of 421 is 421 × 421.

• Square root: A square root of a number is a value that, when multiplied by itself, gives the original number. The square root of 177,241 is 421.

• Perfect square: A number that is the square of an integer. For example, 177,241 is a perfect square because it is 421².