Multiples of 21
2026-02-28 13:27 Diff

Understanding the multiples of 21 helps solve mathematical problems and boost our multiplication and division skills. When working with multiples of 21, we need to apply it to different mathematical operations such as addition, subtraction, multiplication, and division.

Sum of first 5 Multiples of 21:

 
21, 42, 63, 84, and 105 are the first five multiples of 21. When multiplying 21 from 1 to 5 we get these numbers as the products.  
So, the sum of these multiples is:  


21 + 42 + 63 + 84 + 105 = 315  


When we add the first 5 multiples of 21 the answer will be 315.

Subtraction of first 5 Multiples of 21:

 
While we do subtraction, it improves our comprehension of how the value decreases when each multiple is subtracted from the previous one. 21, 42, 63, 84, and 105 are the first five multiples of 21. So, let us calculate it as given below:

 
21 - 42 = -21  
-21 - 63 = -84  
-84 - 84 = -168  
-168 - 105 = -273  


Hence, the result of subtracting the first 5 multiples of 21 is -273.

Average of first 5 Multiples of 21:  


To calculate the average, we need to identify the sum of the first 5 multiples of 21, 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 21 is 315.  


21 + 42 + 63 + 84 + 105 = 315

 
Next, divide the sum by 5:  


315 ÷ 5 = 63  


63 is the average of the first 5 multiples of 21.

Product of First 5 Multiples of 21:  


The product of given numbers is the result of multiplying all of them together. Here, the first 5 multiples of 21 include: 21, 42, 63, 84, and 105. Now, the product of these numbers is:  


21 × 42 × 63 × 84 × 105 = 234,256,320  


The product of the first 5 multiples of 21 is 234,256,320.

Division of First 5 Multiples of 21:  


While we perform division, we get to know how many times 21 can fit into each of the given multiples. 21, 42, 63, 84, and 105 are the first 5 multiples of 21.

 
21 ÷ 21 = 1  
42 ÷ 21 = 2  
63 ÷ 21 = 3  
84 ÷ 21 = 4  
105 ÷ 21 = 5  


The results of dividing the first 5 multiples of 21 are: 1, 2, 3, 4, and 5.