Ordinal Numbers 1 to 100 – Definition, Chart, Rules & Practice

The concept of ordinal numbers 1 to 100 plays a key role in mathematics and is widely applicable to both real-life situations and exam scenarios.

What Is Ordinal Numbers 1 to 100?

An ordinal number is a number used to indicate the exact position or order of objects, people, or items in a list — such as 1st, 2nd, 3rd, and so on, up to 100th. These numbers answer the question: “Which position?” You’ll find this concept applied in ranking, event sequencing, dates, competitions, and arrangements. Ordinal numbers differ from cardinal numbers, which indicate quantity (like one, two, three). In ordinal form, numbers show order, not count. For example, in a race, “third” tells you who finished at which spot, not how many runners there were.

Ordinal Numbers 1 to 100 Chart

Below is a handy reference chart showing ordinal numbers from 1st to 100th, both in numeric symbol and word spelling. This helps you quickly find the correct way to write or say any ordinal number.

How to Write and Use Ordinal Numbers

Most ordinal numbers are formed by adding -st, -nd, -rd, or -th to the number – for example, 1st, 2nd, 3rd, 4th. The main patterns are:

• For numbers ending in 1, use "st" (except 11 → 11th): 21st, 31st
• For numbers ending in 2, use "nd" (except 12 → 12th): 22nd, 32nd
• For numbers ending in 3, use "rd" (except 13 → 13th): 23rd, 33rd
• For all other numbers, use "th": 4th, 5th, 11th, 12th, 13th, 20th, etc.

Common exceptions (all the 'teens') always use "th": 11th, 12th, 13th. Always write or speak the ordinal spelling as "first", "second", "third", etc., and use symbols for informal lists or tables (“21st birthday”, “5th place”).

Ordinal Numbers in Real Life

Ordinal numbers are seen and used everywhere:

• Dates and events: “August 15th”, “31st December”
• Competitions: “He finished 3rd in the race”
• Classrooms: “She sits in the 4th row”
• Queue or sequence: “You are 18th to be served”
• Levels or floors: “My flat is on the 7th floor”

Practice: Try These Yourself

• Write the ordinal number spelling for 27 and 62.
• Which ordinal comes after Forty-Ninth?
• Fill in the blank: The 15__ student (write correct suffix).
• Use ordinal numbers to write any two dates in your birthday month.

Tips and Tricks to Remember Ordinal Spellings

• Remember “st” for 1st, “nd” for 2nd, “rd” for 3rd — for all numbers ending with 1, 2, 3 (but not 11, 12, 13!).
• Numbers from 4th onwards use “th” (except those ending with 1, 2, or 3 above).
• “Eighth”, “Ninth”, “Twelfth” have unique spellings — try creating a mnemonic or visual cue for tricky words.
• After twenty, use patterns: “Twenty-first”, “Thirty-second” — just fuse the number names and ordinal suffix.

Vedantu’s live sessions often use charts, games, and tips to help children remember tricky spellings faster.

Ordinal Numbers vs Cardinal Numbers

For deeper understanding, see Cardinal Numbers article at Vedantu.

Related Concepts and Links

• Ordinal Numbers Worksheet for more practice
• Number Names 1 to 20 for spelling basics
• Number Names 1 to 50 for gradual learning
• Place Value in Maths for understanding order and position

We explored ordinal numbers 1 to 100 — from their definition, real-life application, writing rules, tips, and comparison with counting numbers. Keep practicing on Vedantu to make spelling and using ordinal numbers fast and fun!