211 LearnersLast updated on May 26th, 2025
Multiples of 20
In math, multiples are the products we get while multiplying a number with other numbers. Multiples play a key role in construction and design, counting groups of items, sharing resources equally, and managing time effectively. In this topic, we will learn the essential concepts of multiples of 20.
What are the Multiples of 20?
Now, let us learn more about multiples of 20. Multiples of 20 are the numbers you get when you multiply 20 by any whole number, including zero. Each number has an infinite number of multiples, including a multiple of itself. In multiplication, a multiple of 20 can be denoted as 20 × n, where ‘n’ represents any whole number (0, 1, 2, 3,…). So, we can summarize that:
Multiple of a number = Number × Any whole number
For example, multiplying 20 × 1 will give us 20 as the product. Multiples of 20 will be larger or equal to 20.
List of First 20 Multiples of 20
Multiples of 20 include the products of 20 and an integer. Multiples of 20 are divisible by 20 evenly. The first few multiples of 20 are given below:
| TABLE OF 20 (1-10) | |
|---|---|
|
20 x 1 = 20 |
20 x 6 = 120 |
|
20 x 2 = 40 |
20 x 7 = 140 |
|
20 x 3 = 60 |
20 x 8 = 160 |
|
20 x 4 = 80 |
20 x 9 = 180 |
|
20 x 5 = 100 |
20 x 10 = 200 |
| TABLE OF 20 (11-20) | |
|---|---|
|
20 x 11 = 220 |
20 x 16 = 320 |
|
20 x 12 = 240 |
20 x 17 = 340 |
|
20 x 13 = 260 |
20 x 18 = 360 |
|
20 x 14 = 280 |
20 x 19 = 380 |
|
20 x 15 = 300 |
20 x 20 = 400 |
Now, we know the first few multiples of 20. They are 0, 20, 40, 60, 80, 100, 120, 140, 160, 180, 200,...
Operations with Multiples of 20
Understanding the multiples of 20 helps solve mathematical problems and boosts our multiplication and division skills. When working with multiples of 20, we need to apply it to different mathematical operations such as addition, subtraction, multiplication, and division.
Sum of first 5 Multiples of 20:
20, 40, 60, 80, and 100 are the first five multiples of 20. When multiplying 20 from 1 to 5, we get these numbers as the products.
So, the sum of these multiples is:
20 + 40 + 60 + 80 + 100 = 300
When we add the first 5 multiples of 20, the answer will be 300.
Subtraction of first 5 Multiples of 20:
While we do subtraction, it improves our comprehension of how the value decreases when each multiple is subtracted from the previous one. 20, 40, 60, 80, and 100 are the first five multiples of 20. So, let us calculate it as given below:
20 - 40 = -20
-20 - 60 = -80
-80 - 80 = -160
-160 - 100 = -260
Hence, the result of subtracting the first 5 multiples of 20 is -260.
Average of first 5 Multiples of 20:
To calculate the average, we need to identify the sum of the first 5 multiples of 20, and then divide it by the count, i.e., 5. Because there are 5 multiples presented in the calculation. Averaging helps us to understand the concepts of central tendencies and other values. We know the sum of the first 5 multiples of 20 is 300.
20 + 40 + 60 + 80 + 100 = 300
Next, divide the sum by 5:
300 ÷ 5 = 60
60 is the average of the first 5 multiples of 20.
Product of First 5 Multiples of 20:
The product of given numbers is the result of multiplying all of them together. Here, the first 5 multiples of 20 include: 20, 40, 60, 80, and 100. Now, the product of these numbers is:
20 × 40 × 60 × 80 × 100 = 38,400,000
The product of the first 5 multiples of 20 is 38,400,000.
Division of First 5 Multiples of 20:
While we perform division, we get to know how many times 20 can fit into each of the given multiples. 20, 40, 60, 80, and 100 are the first 5 multiples of 20.
20 ÷ 20 = 1
40 ÷ 20 = 2
60 ÷ 20 = 3
80 ÷ 20 = 4
100 ÷ 20 = 5
The results of dividing the first 5 multiples of 20 are: 1, 2, 3, 4, and 5.
Common Mistakes and How to Avoid Them in Multiples of 20
While working with multiples of 20, we make common mistakes. Identifying these errors and understanding how to avoid them can be helpful. Below are some frequent mistakes and tips to avoid them:
Mistake 1
Confusing Multiples with Factors
Sometimes, students get confused between the multiples and factors of 20. A simple trick to differentiate between the two is to remember that multiples are the products of multiplication, while factors are the divisors of the number. Multiples of 20 refer to the products we get while multiplying 20 with other numbers. For example, multiples of 20 include 0, 20, 40, 60, 80, 100, 120, 140, 160, 180, 200….
The factors of 20 are 1, 2, 4, 5, 10, and 20. When 20 is divided by these numbers, the remainder will be zero. These are the factors of 20 meaning that these numbers can divide 20 without any remainder.
Factors of 20:
20 ÷ 1 = 20
20 ÷ 2 = 10
20 ÷ 4 = 5
20 ÷ 5 = 4
20 ÷ 10 = 2
20 ÷ 20 = 1
Mistake 2
Skipping Multiples while Listing
Be careful when listing each multiple in the sequence. Otherwise, it may lead to incorrect calculations and results. Children sometimes skip multiples when writing them. To clearly understand the issue, take a look at this:
Multiples of 20 include 20, 40, 60, 80, 100, 120, …..200, 220,...
If children do this, they may get confused and mix up the sequential order. So, maintain a consistent order by including each multiple.
Mistake 3
Forgetting to Check the Results with Multiplication
If you are adding or subtracting multiples of 20, the result will still be a multiple of 20. For example, children may write,
20 + 40 = 65, (which is wrong and the correct answer is 60)
This is incorrect because 65 is not a multiple of 20. The same applies to subtraction. When you are adding or subtracting, ensure that the results are multiples of 20.
Mistake 4
Ignoring the Concept of Zero
Don’t forget that zero is a multiple of every number. The very first multiple of 20, and any other number, is zero, it has a valid value. Remember this:
20 × 0 = 0.
Mistake 5
Using Addition Instead of Multiplication
Apply multiplication for calculations and check the results for accuracy. Sometimes, children may incorrectly add 20 + 20 + 20 + 20 + 20. Instead of adding too many values, use multiplication. Calculate 20 × n for the nth multiple.
For example, instead of 20 + 20 + 20 + 20 + 20, calculate it as given below:
20 × 5 = 100
Multiples of 20 Examples
Problem 1
Lila is organizing a charity event where each sponsor donates packs of water bottles. Each pack contains 20 bottles. If 5 sponsors each donate one pack every month for 3 months, how many bottles will they have altogether?
300 bottles
Explanation
Each sponsor donates 20 bottles per pack. With 5 sponsors, the total number of bottles per month is 20 × 5 = 100. Over 3 months, this becomes:
100 × 3 = 300
They will have 300 bottles altogether.
Problem 2
A local bakery bakes batches of cookies, with each batch containing 20 cookies. Over a week, they bake the first three multiples of 20 batches. How many cookies do they bake by the end of the week?
1200 cookies
Explanation
The first three multiples of 20 are 20, 40, and 60. To find the total number of cookies baked:
20 × 1 = 20
20 × 2 = 40
20 × 3 = 60
Adding these gives the total number of batches: 20 + 40 + 60 = 120. Since each batch has 10 cookies:
120 × 10 = 1200
The bakery bakes 1200 cookies by the end of the week.
Problem 3
In a community center, there are 20 tables. During an event, each table is set up with 20 chairs. How many chairs are there in total?
400 chairs
Explanation
To find the total number of chairs, multiply the number of tables by the number of chairs per table:
Number of tables = 20
Number of chairs per table = 20
20 × 20 = 400
Therefore, there are a total of 400 chairs in the community center.
Problem 4
Ben is creating gift bags for a party. He prepares 4 rows of gift bags, with each row containing 20 bags. How many gift bags does he have in total?
80 gift bags
Explanation
To find the total number of gift bags, multiply the number of rows by the number of bags in each row:
Number of rows = 4
Number of bags per row = 20
4 × 20 = 80
So, Ben has 80 gift bags in total.
Problem 5
Clara is stacking her art supplies. She places 20 pencils in the first container, 40 in the second, and 60 in the third. How many pencils are there in all three containers?
120 pencils
Explanation
The first container has 20 pencils, the second has 40, and the third has 60. Adding these gives:
20 + 40 + 60 = 120
Therefore, there are a total of 120 pencils in all three containers.
FAQs on Multiples of 20
1.How do you find the multiples of 20?
2.What is the LCM of 15 and 20?
3.What are the real-life applications of Multiples of 20?
4.Are multiples of 20 finite or infinite?
5.Is there any odd multiples of 20?
Important Glossaries for Multiples of 20
- Multiple: A multiple represents the product of a number that may be multiplied by an integer. For example, multiples of 20 include 20, 40, 60, 80, etc.
- Number pattern: This refers to how numbers are listed. It should follow a certain sequence. Multiples of 20 are the numbers that consist of the number pattern of 20.
- Even number: An even number refers to any number that can be divisible by 2 without leaving any remainder. The last digits of even numbers are 0, 2, 4, 6, or 8. All multiples of 20 are even numbers.
- Divisor: It refers to any number by which another number can be divided without leaving any remainder. 1, 2, 4, 5, 10, and 20 are the divisors of 20.
- Least Common Multiple (LCM): The smallest common multiple of two or more numbers. For example, the LCM of 15 and 20 is 60.
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Seyed Ali Fathima S
About the Author
Seyed Ali Fathima S a math expert with nearly 5 years of experience as a math teacher. From an engineer to a math teacher, shows her passion for math and teaching. She is a calculator queen, who loves tables and she turns tables to puzzles and songs.
Fun Fact
: She has songs for each table which helps her to remember the tables
