Ordinal Numbers – Definition, FAQs, Practice Problems, Examples

Welcome to another engaging and informative post from Brighterly, your trusted partner in making mathematics enjoyable and accessible for children. Today, we delve into the fascinating world of Ordinal Numbers, a cornerstone concept in the mathematical journey of a child. As we unravel this topic, we’ll help your child not only understand what ordinal numbers are, but also appreciate their importance and application in everyday life. We will guide you through lists of ordinal numbers, compare them with cardinal and nominal numbers, and provide solved examples for clarity. Furthermore, we offer exciting practice problems that will challenge your child’s understanding and improve their grasp of this concept. Here at Brighterly, we believe in making mathematics a fun-filled adventure for all children.

What are Ordinal Numbers?

Ordinal Numbers are essential elements in the realm of mathematics that allow us to establish position or ranking in a set sequence. Unlike cardinal numbers, which quantify the “how many,” ordinal numbers answer the “what position” in a line-up. The terms first, second, third, fourth, etc., are all examples of ordinal numbers, used to express a relative position within a series.

This unique concept of ranking and order holds significant value across various applications in everyday life. From denoting dates, naming floors of a building, to scheduling events, ordinal numbers play a pivotal role. A comprehensive understanding of this simple yet powerful mathematical concept can greatly enhance a child’s numerical literacy. Find out more about the importance of ordinal numbers on the Brighterly website.

Applications of Ordinal Numbers

Ordinal Numbers find their use in diverse scenarios in our daily lives. Their primary role is to define order or positions. For instance, in a race, we don’t merely want to know how many participants competed; we’re also interested in knowing the first, second, third place, and so forth. This “placing” is done with the help of ordinal numbers.

Ordinal numbers also help us specify the sequence of events. For instance, children learn the progression of their daily activities, such as first, they brush their teeth, second, they get dressed, and so on. In education, ordinal numbers are critical in sequencing steps or stages in problems and processes. Learn more about the real-world applications of ordinal numbers on our website.

Ordinal Numbers 1 – 50 list

Let’s dive into the list of ordinal numbers from 1 to 50 to further solidify our understanding:

  • 1st, 2nd, 3rd, 4th, 5th, 6th, 7th, 8th, 9th, 10th
  • 11th, 12th, 13th, 14th, 15th, 16th, 17th, 18th, 19th, 20th
  • 21st, 22nd, 23rd, 24th, 25th, 26th, 27th, 28th, 29th, 30th
  • 31st, 32nd, 33rd, 34th, 35th, 36th, 37th, 38th, 39th, 40th
  • 41st, 42nd, 43rd, 44th, 45th, 46th, 47th, 48th, 49th, 50th

Ordinal Numbers 51–100 list

To fully grasp the pattern of ordinal numbers, let’s continue with the list of ordinal numbers from 51 to 100:

  • 51st, 52nd, 53rd, 54th, 55th, 56th, 57th, 58th, 59th, 60th
  • 61st, 62nd, 63rd, 64th, 65th, 66th, 67th, 68th, 69th, 70th
  • 71st, 72nd, 73rd, 74th, 75th, 76th, 77th, 78th, 79th, 80th
  • 81st, 82nd, 83rd, 84th, 85th, 86th, 87th, 88th, 89th, 90th
  • 91st, 92nd, 93rd, 94th, 95th, 96th, 97th, 98th, 99th, 100th

Ordinal Numbers v. Cardinal Numbers

While both ordinal and cardinal numbers are critical components of our number system, they serve distinct functions. As mentioned earlier, cardinal numbers determine “how many” of something there is, while ordinal numbers identify the order or position of items within a set.

For example, if we have five apples, “five” is the cardinal number representing the quantity. But if we line up these apples and refer to the second apple in the row, “second” is the ordinal number denoting its position.

Ordinal Numbers v. Nominal Numbers

Contrasting from both cardinal and ordinal numbers, nominal numbers are utilized for identification, not for indicating quantity or position. These numbers act as labels or tags and don’t possess a mathematical value.

For instance, while cardinal numbers tell us “how many players” and ordinal numbers tell us “which position” a player stands in a game, nominal numbers might simply identify the players by their jersey numbers. Here, the jersey number 10 doesn’t mean that there are ten players or the player is in the tenth position.

Solved Examples On Ordinal Numbers

Let’s solidify our understanding with a few solved examples:

  1. Example: In a queue of 7 people, if you are the third person, how many people are in front of you?

    Solution: As an ordinal number, “third” means there are two people in front of you.

  2. Example: In a book with 50 pages, what is the ordinal number for the last page?

    Solution: The ordinal number for the last page is “50th.”

Learn more about these solved examples on ordinal numbers on our website.

Practice Problems On Ordinal Numbers

Let’s put your newfound knowledge to the test with some practice problems. Try solving these on your own:

  1. In a race of 10 runners, if you finished 5th, how many runners finished before you?
  2. If today is the 7th day of the month, what will be the date five days from now?
  3. In a class of 30 students, if you are 15th in line, how many students are behind you?

Check your answers here at Brighterly’s practice problems on ordinal numbers.


Exploring the realm of Ordinal Numbers with Brighterly, we have embarked on an educational journey that has enlightened us on this key mathematical concept. We have navigated through definitions, applications, lists, comparisons, examples, and even faced some challenges with practice problems. Through this adventure, we hope to have enriched your child’s mathematical understanding and piqued their curiosity, making them excited about the universe of numbers that awaits them. Remember, at Brighterly, our goal is to ignite a passion for learning, foster creativity, and promote a holistic understanding of mathematics in a fun, engaging manner. Stay tuned for more such exciting explorations into the world of numbers with Brighterly!

Frequently Asked Questions On Ordinal Numbers

What is the use of Ordinal Numbers?

Ordinal numbers are used to indicate position, order, or ranking in a list or set. They are essential in various aspects of daily life and education. For instance, they can denote the order of finishers in a race (1st, 2nd, 3rd, etc.) or the sequence of steps in a process (first, do this, second, do that, etc.).

What is the difference between Ordinal Numbers and Cardinal Numbers?

While both are types of numbers, they serve distinct purposes. Cardinal numbers represent the quantity of a group or set (i.e., “how many”). In contrast, ordinal numbers reflect the position or order of items within a set or list. For example, if you have five apples (cardinal number), and you ate the third one (ordinal number), the ‘five’ denotes quantity, while the ‘third’ represents position.

How do Ordinal Numbers relate to Nominal Numbers?

Nominal numbers are quite different from both cardinal and ordinal numbers. While cardinal numbers reflect quantity and ordinal numbers show position, nominal numbers are used merely for identification. They don’t indicate any order, ranking, or amount. Examples of nominal numbers include jersey numbers in sports or student ID numbers in a school.

How can we help children understand Ordinal Numbers better?

Practical examples and real-life scenarios are excellent ways to help children understand and remember the concept of ordinal numbers. For instance, asking them about their position in a line-up or the order of daily activities can reinforce their understanding of ordinal numbers. At Brighterly, we offer a range of engaging learning materials, practice problems, and fun activities to help children master this concept.

Information Sources:
  1. Ordinal Numbers | Basic Mathematics
  2. Ordinal number – Wikipedia
  3. Ordinal Numbers: Meaning, Examples & Worksheets | Helping With Math

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