102 LearnersLast updated on May 26th, 2025
Square of 842
The product of multiplying an integer by itself is the square of a number. Square is used in programming, calculating areas, and so on. In this topic, we will discuss the square of 842.
What is the Square of 842
The square of a number is the product of the number itself. The square of 842 is 842 × 842. The square of a number always ends in 0, 1, 4, 5, 6, or 9. We write it in math as 842², where 842 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 842 is 842 × 842 = 708,964.
Square of 842 in exponential form: 842²
Square of 842 in arithmetic form: 842 × 842
How to Calculate the Value of Square of 842
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.
- By Multiplication Method
- Using a Formula
- Using a Calculator
By the Multiplication method
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 842
Step 1: Identify the number. Here, the number is 842
Step 2: Multiplying the number by itself, we get, 842 × 842 = 708,964.
The square of 842 is 708,964.
Using a Formula (a²)
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 842 So: 842² = 842 × 842 = 708,964
By Using a Calculator
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 842.
Step 1: Enter the number in the calculator Enter 842 in the calculator.
Step 2: Multiply the number by itself using the multiplication button (×) That is 842 × 842
Step 3: Press the equal to button to find the answer Here, the square of 842 is 708,964.
Tips and Tricks for the Square of 842
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.
Common Mistakes to Avoid When Calculating the Square of 842
Mistakes are common among kids when doing math, especially when it is finding the square of a number. Let’s learn some common mistakes to master the squaring of a number.
Mistake 1
Calculation errors:
Calculation errors mostly happen when students skip the steps or else by swapping the digits. To avoid it, students should double-check the answer. They can double-check by finding the square root of the solution they found. For example, the square of 25 is 625, and the square root of 625 is ±25.
Solved Examples on Square of 842
Problem 1
Find the length of the square, where the area of the square is 708,964 cm².
The area of a square = a²
So, the area of a square = 708,964 cm²
So, the length = √708,964 = 842.
The length of each side = 842 cm
Explanation
The length of a square is 842 cm.
Because the area is 708,964 cm² the length is √708,964 = 842.
Problem 2
Lisa is planning to paint her square wall of length 842 feet. The cost to paint a foot is 3 dollars. Then how much will it cost to paint the full wall?
The length of the wall = 842 feet
The cost to paint 1 square foot of wall = 3 dollars.
To find the total cost to paint, we find the area of the wall,
Area of the wall = area of the square = a²
Here a = 842
Therefore, the area of the wall = 842² = 842 × 842 = 708,964.
The cost to paint the wall = 708,964 × 3 = 2,126,892.
The total cost = 2,126,892 dollars
Explanation
To find the cost to paint the wall, we multiply the area of the wall by the cost to paint per foot. So, the total cost is 2,126,892 dollars.
Problem 3
Find the area of a circle whose radius is 842 meters.
The area of the circle = 2,227,759.76 m²
Explanation
The area of a circle = πr²
Here, r = 842
Therefore, the area of the circle = π × 842² = 3.14 × 842 × 842 = 2,227,759.76 m².
Problem 4
The area of the square is 708,964 cm². Find the perimeter of the square.
The perimeter of the square is 3,368 cm.
Explanation
The area of the square = a²
Here, the area is 708,964 cm²
The length of the side is √708,964 = 842
Perimeter of the square = 4a
Here, a = 842
Therefore, the perimeter = 4 × 842 = 3,368.
Problem 5
Find the square of 843.
The square of 843 is 710,649.
Explanation
The square of 843 is multiplying 843 by 843.
So, the square = 843 × 843 = 710,649.
FAQs on Square of 842
1.What is the square of 842?
2.What is the square root of 842?
3.Is 842 a prime number?
4.What are the first few multiples of 842?
5.What is the square of 841?
6.How does learning Algebra help students in Vietnam make better decisions in daily life?
7.How can cultural or local activities in Vietnam support learning Algebra topics such as Square of 842?
8.How do technology and digital tools in Vietnam support learning Algebra and Square of 842?
9.Does learning Algebra support future career opportunities for students in Vietnam?
Important Glossary for Square of 842.
- Square: The product of multiplying a number by itself.
- Exponential form: A way of writing numbers using bases and exponents, such as 842².
- Perfect square: A number that is the square of an integer, e.g., 16, 25.
- Square root: A number which produces a specified quantity when multiplied by itself.
- Multiplication method: A process of finding the square by multiplying the number by itself.
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Jaskaran Singh Saluja
About the Author
Jaskaran Singh Saluja is a math wizard with nearly three years of experience as a math teacher. His expertise is in algebra, so he can make algebra classes interesting by turning tricky equations into simple puzzles.
Fun Fact
: He loves to play the quiz with kids through algebra to make kids love it.
