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Last updated on August 5, 2025
Number names are a way of expressing the written form of numbers using letters. Learning number names will help you learn the basics of counting, addressing parcels, official documents, and so on. In this topic, we will learn number names from 21 to 50.
These are the words we use to represent numbers, making them easier to read and understand.
Take the number 25 — it is written as ‘Twenty-Five’.
Writing numbers in words not only helps us with legal documents and form-filling, but it also improves a student's spelling skills.
There are two main ways of naming numbers:
Indian Numbering System
International Numbering System
Understanding how numbers are named in both systems will help in communication and arithmetic calculations.
Let’s now explore both numbering systems.
In the Indian Numbering System, digits are assigned place values starting from the right.
These include ones, tens, hundreds, thousands, and continue to grow as the number increases.
For example, in the number 46,
6 is in the ones place
4 is in the tens place
The full order of place values is:
Ones → Tens → Hundreds → Thousands → Ten Thousands → Lakhs → Ten Lakhs → Crores
Each digit gets its value based on its position.
Let’s take the number 48,273.
It is written in words as: Forty-Eight Thousand Two Hundred Seventy-Three
Its place value breakdown is:
4 in the ten thousands place
8 in the thousands place
2 in the hundreds place
7 in the tens place
3 in the ones place
Just like the Indian Numbering System, the International Numbering system also uses names, and they differ for bigger numbers. The place value starts from the right. The place values are ones, tens, hundreds, thousands, hundred thousands, millions, ten millions, hundred millions, and so on. Let’s take the example of 743,856. The number is written as Seven Hundred Forty-Three Thousand Eight Hundred Fifty-Six. The number gets placed as: 7 in the Hundred Thousands place 4 in the Ten Thousands place 3 in the Thousands place 8 in the Hundreds place 5 in the Tens place 6 in the Ones place
Learning the names of the numbers from 21 to 50 using a chart will make it easy for students to write the numbers in words. List of Numbers in Words 21 to 50 The list given below shows how numbers from 21 to 50 are written using letters. Learning to write the numbers in words improves their skills in reading and writing.
While writing numbers from 21 to 50, there are certain rules to be followed. Below are some rules to keep in mind while writing the names of numbers. Rule 1: Always start naming with ‘Twenty’ for any number from 21 to 29. For example, 25 is written as Twenty-Five. Rule 2: For numbers in the 30s, use “Thirty.” For example, 32 is written as Thirty-Two. Rule 3: Numbers follow a pattern. For example, 45 is written as Forty-Five, 48 is written as Forty-Eight, and 50 is written as Fifty.
Always use a hyphen while writing numbers like 25 and 38. It should be written as Twenty-Five and Thirty-Eight. Always keep writing the numbers with the base word for the tens, such as Thirty for 30s and Forty for 40s. Always focus on the tens place for numbers like 30, 40, 50, etc. After writing Thirty, Forty, or Fifty, you just need to add the number if it's not a round ten. The mentioned numbers can be written as Thirty, Forty, and Fifty.
Students can make mistakes while learning number names. Let’s discuss a few mistakes a student can make while writing numbers from 21 to 50.
What is the sum of 15 + 21 in words?
Thirty-Six
First, we need to find the sum 15 + 21.
The sum is 36 → 15 + 21 = 36.
We write 36 in words as Thirty-Six.
What is the difference of 50 - 5 in words?
Forty-Five
We need to find the difference between 50 and 5.
The difference is 45 → 50 - 5 = 45.
Therefore, we write the answer as Forty-Five.
Find the product of 7 and 3. Write the result in words.
Twenty-One
The product is 21 → 7 × 3 = 21.
Hence, 21 in words is Twenty-One.
What is (40 ÷ 2) + 10 in words?
Thirty
((40 ÷ 2) + 10) = 20 + 10 = 30.
We find the final result as 30.
Therefore, 30 is written as Thirty.
What is the product of 2 and 25 in words?
Fifty
The product of 2 and 25 is 50. → 2 × 25 = 50.
So, 50 in words is Fifty.
Hiralee Lalitkumar Makwana has almost two years of teaching experience. She is a number ninja as she loves numbers. Her interest in numbers can be seen in the way she cracks math puzzles and hidden patterns.
: She loves to read number jokes and games.