Understanding how to express numbers in Korean is crucial for effective communication, whether you’re planning a trip to South Korea, learning the language, or simply expanding your linguistic horizons. Saying “21” in Korean might seem straightforward, but it involves understanding different number systems and their appropriate contexts.
This article provides a comprehensive guide to mastering Korean numerals, specifically focusing on how to say “21” using both the Sino-Korean and Native Korean number systems. This knowledge is essential for anyone wanting to navigate daily life in Korea, from shopping and telling time to making reservations and understanding ages.
This guide will benefit language learners of all levels, from beginners to advanced students, as well as anyone interested in Korean culture.
Table of Contents
- Introduction
- Definition of Korean Number Systems
- Structural Breakdown of Korean Numerals
- Korean Number Systems: Sino-Korean vs. Native Korean
- Examples of Saying “21” in Korean
- Usage Rules for Korean Numerals
- Common Mistakes When Using Korean Numerals
- Practice Exercises
- Advanced Topics: Beyond Basic Numerals
- Frequently Asked Questions
- Conclusion
Definition of Korean Number Systems
The Korean language employs two distinct number systems: the Sino-Korean system, which is derived from Chinese, and the Native Korean system, which is indigenous to the Korean peninsula. Each system has its own set of numerals and is used in different contexts. Understanding these systems is crucial for accurately expressing numbers in Korean.
The Sino-Korean system is primarily used for counting larger numbers, dates, money, phone numbers, addresses, and measurements. It is also used when counting objects with counters that are of Chinese origin.
The Native Korean system, on the other hand, is generally used for counting objects, ages, and hours (when telling time).
Classification and Function
Classification: Korean numbers can be classified into two main types: Sino-Korean and Native Korean. Each type has its own set of numerals from one to ninety-nine, after which the systems diverge more significantly for larger numbers.
Function: The function of Korean numerals is to quantify objects, express dates, indicate time, manage finances, provide addresses, and perform various other counting and measuring tasks. The appropriate system to use depends on the specific context.
Contexts for Using Each System
The choice between Sino-Korean and Native Korean numbers depends heavily on the context. Here’s a breakdown:
- Sino-Korean Numbers: Use for prices, phone numbers, dates (years, months, days), addresses, minutes, seconds, and numbers exceeding 100.
- Native Korean Numbers: Use for age, hours (when telling time), and counting objects (up to 99).
Structural Breakdown of Korean Numerals
Korean numerals are structured differently depending on the number system being used. Both systems have unique patterns for combining numerals to form larger numbers.
Sino-Korean Numeral Structure
The Sino-Korean system follows a decimal structure, similar to English. It uses base-10 units such as 십 (sip) for ten, 백 (baek) for hundred, 천 (cheon) for thousand, and 만 (man) for ten thousand. To form larger numbers, you combine these units. For example, twenty is 이십 (isip), which literally translates to “two ten.”
The number 21 in the Sino-Korean system is formed by combining “two ten” (이십) and “one” (일), resulting in 이십일 (isip-il).
Native Korean Numeral Structure
The Native Korean system also uses a decimal structure, but its base units and combination patterns differ. The Native Korean word for ten is 열 (yeol). However, numbers above 99 are generally expressed using the Sino-Korean system.
The number 21 in the Native Korean system is formed by combining “twenty” (스물) and “one” (하나), resulting in 스물하나 (seumul-hana).
Korean Number Systems: Sino-Korean vs. Native Korean
Here’s a detailed comparison of the two Korean number systems, focusing on the numbers relevant to understanding how to say “21”:
Sino-Korean Numbers (일, 이, 삼, 사…)
Sino-Korean numbers are derived from Chinese and are used in a variety of contexts, including dates, money, phone numbers, and measurements. They are generally used for larger numbers and more formal settings.
Here’s a table showing the basic Sino-Korean numbers:
| Number | Sino-Korean | Pronunciation |
|---|---|---|
| 0 | 영/공 (yeong/gong) | Young/Gong |
| 1 | 일 (il) | Il |
| 2 | 이 (i) | Ee |
| 3 | 삼 (sam) | Sam |
| 4 | 사 (sa) | Sa |
| 5 | 오 (o) | O |
| 6 | 육 (yuk) | Yook |
| 7 | 칠 (chil) | Chil |
| 8 | 팔 (pal) | Pal |
| 9 | 구 (gu) | Goo |
| 10 | 십 (sip) | Ship |
| 20 | 이십 (isip) | Ee-ship |
Native Korean Numbers (하나, 둘, 셋, 넷…)
Native Korean numbers are indigenous to the Korean language and are used for counting objects, ages, and hours. They are generally used for smaller numbers and more informal settings.
Here’s a table showing the basic Native Korean numbers:
| Number | Native Korean | Pronunciation |
|---|---|---|
| 1 | 하나 (hana) | Ha-na |
| 2 | 둘 (dul) | Dool |
| 3 | 셋 (set) | Set |
| 4 | 넷 (net) | Net |
| 5 | 다섯 (daseot) | Da-seot |
| 6 | 여섯 (yeoseot) | Yeo-seot |
| 7 | 일곱 (ilgop) | Il-gop |
| 8 | 여덟 (yeodeol) | Yeo-deol |
| 9 | 아홉 (ahop) | A-hop |
| 10 | 열 (yeol) | Yeol |
| 20 | 스물 (seumul) | Seu-mul |
Examples of Saying “21” in Korean
Here are examples of how to say “21” in Korean using both the Sino-Korean and Native Korean number systems, along with example sentences to illustrate their usage.
Sino-Korean Number “21”: 이십일 (isip-il)
In the Sino-Korean system, “21” is expressed as 이십일 (isip-il). This is used in contexts such as dates, money, phone numbers, and addresses.
Here are some example sentences using 이십일:
| Sentence | Romanization | Translation |
|---|---|---|
| 제 전화번호는 공일공-이십일-삼사오육입니다. | Je jeonhwabeonhoneun gongil-gong-isip-il-samsa-oryuk imnida. | My phone number is 010-21-3456. |
| 오늘이 십이월 이십일일입니다. | Oneuri sibiwol isip-irilmida. | Today is December 21st. |
| 이 책은 이십일 페이지부터 시작합니다. | I chaegeun isip-il peijibuteo sijakhamnida. | This book starts from page 21. |
| 이 물건의 가격은 이십일 달러입니다. | I mulgeonui gagyeogeun isip-il dalleoimnida. | The price of this item is 21 dollars. |
| 주소는 이십일번지입니다. | Jusoneun isip-il beonjiimnida. | The address is number 21. |
| 그는 이십일 세기에 태어났습니다. | Geuneun isip-il segie taeeonasseumnida. | He was born in the 21st century. |
| 이십일 그램의 설탕을 넣어주세요. | Isip-il geuraemui seoltangeul neoeojuseyo. | Please add 21 grams of sugar. |
| 이십일 퍼센트 할인됩니다. | Isip-il peosenteu harindoemida. | It is 21 percent off. |
| 그녀는 이십일 명의 학생을 가르칩니다. | Geunyeoneun isip-il myeongui haksaengeul gareuchimnida. | She teaches 21 students. |
| 이십일 년 전에 우리는 만났습니다. | Isip-il nyeon jeone urineun mannasseumnida. | We met 21 years ago. |
| 이십일 개의 사탕이 있습니다. | Isip-il gaeui satangi isseumnida. | There are 21 candies. |
| 그는 이십일 층에 살고 있습니다. | Geuneun isip-il cheunge salgo isseumnida. | He lives on the 21st floor. |
| 이십일 분 후에 다시 전화하겠습니다. | Isip-il bun hue dasi jeonhwahagetsseumnida. | I will call back in 21 minutes. |
| 이십일 밀리미터의 비가 왔습니다. | Isip-il millimiteoui biga wasseumnida. | 21 millimeters of rain fell. |
| 이십일 킬로미터를 걸었습니다. | Isip-il killomiteoreul georeotseumnida. | I walked 21 kilometers. |
| 이십일 개의 방이 필요합니다. | Isip-il gaeui bangi pilyohamnida. | We need 21 rooms. |
| 이십일 도입니다. | Isip-il doimnida. | It is 21 degrees. |
| 이십일 달러를 지불했습니다. | Isip-il dalleoreul jibulhaetseumnida. | I paid 21 dollars. |
| 이십일 명의 손님이 왔습니다. | Isip-il myeongui sonnimi wasseumnida. | 21 guests came. |
| 이십일 일 동안 여행을 갔습니다. | Isip-il il dongan yeohaengeul gasseumnida. | I went on a trip for 21 days. |
| 이십일 권의 책을 샀습니다. | Isip-il gwonui chaegeul sasseumnida. | I bought 21 books. |
| 이십일 개의 상자가 있습니다. | Isip-il gaeui sangjaga isseumnida. | There are 21 boxes. |
| 이십일 마리의 개가 있습니다. | Isip-il marigui gaega isseumnida. | There are 21 dogs. |
| 이십일 그루의 나무가 있습니다. | Isip-il geuroui namuga isseumnida. | There are 21 trees. |
| 이십일 장의 사진을 찍었습니다. | Isip-il jangui sajineul jjigeotseumnida. | I took 21 photos. |
Native Korean Number “21”: 스물하나 (seumul-hana)
In the Native Korean system, “21” is expressed as 스물하나 (seumul-hana). This is primarily used for counting objects and stating ages.
Here are some example sentences using 스물하나:
| Sentence | Romanization | Translation |
|---|---|---|
| 저는 스물하나 살입니다. | Jeoneun seumul-hana sarimnida. | I am 21 years old. |
| 사과가 스물하나 개 있습니다. | Sagwaga seumul-hana gae isseumnida. | There are 21 apples. |
| 스물하나 시에 만나요. | Seumul-hana sie mannayo. | Let’s meet at 9 PM (21:00). |
| 스물하나 송이의 꽃을 샀어요. | Seumul-hana songiui kkocheul sasseoyo. | I bought 21 flowers. |
| 스물하나 마리의 새가 날아갔어요. | Seumul-hana marigui saega naragasseoyo. | 21 birds flew away. |
| 스물하나 명의 아이들이 놀고 있어요. | Seumul-hana myeongui aideuri nolgo isseoyo. | 21 children are playing. |
| 스물하나 그루의 나무를 심었어요. | Seumul-hana geuroui namureul simeosseoyo. | I planted 21 trees. |
| 스물하나 채의 집이 있어요. | Seumul-hana chaeui jibi isseoyo. | There are 21 houses. |
| 스물하나 벌의 옷을 샀어요. | Seumul-hana beorui oseul sasseoyo. | I bought 21 pieces of clothing. |
| 스물하나 켤레의 신발이 있어요. | Seumul-hana kyeolleui sinbari isseoyo. | There are 21 pairs of shoes. |
| 스물하나 자루의 연필이 필요해요. | Seumul-hana jarui yeonpili pilyohaeyo. | I need 21 pencils. |
| 스물하나 대의 차가 주차되어 있어요. | Seumul-hana daeui chaga juchadoeeo isseoyo. | 21 cars are parked. |
| 스물하나 권의 책이 있어요. | Seumul-hana gwonui chaegeul isseoyo. | There are 21 books. |
| 스물하나 장의 사진이 있어요. | Seumul-hana jangui sajini isseoyo. | There are 21 photos. |
| 스물하나 통의 우유를 샀어요. | Seumul-hana tongui uyureul sasseoyo. | I bought 21 cartons of milk. |
| 스물하나 병의 맥주가 있어요. | Seumul-hana byeongui maekjuga isseoyo. | There are 21 bottles of beer. |
| 스물하나 개의 의자가 있습니다. | Seumul-hana gaeui uijaga isseumnida. | There are 21 chairs. |
| 스물하나 마리의 고양이가 있습니다. | Seumul-hana marigui goyangiga isseumnida. | There are 21 cats. |
| 스물하나 상자의 선물이 있습니다. | Seumul-hana sangjaui seonmuri isseumnida. | There are 21 boxes of gifts. |
| 스물하나 명의 선생님이 있습니다. | Seumul-hana myeongui seonsaengnimi isseumnida. | There are 21 teachers. |
| 스물하나 그릇의 밥을 먹었습니다. | Seumul-hana geureusui babeul meogeotseumnida. | I ate 21 bowls of rice. |
| 스물하나 잔의 커피를 마셨습니다. | Seumul-hana janui keopireul masyeotseumnida. | I drank 21 cups of coffee. |
| 스물하나 개의 문제가 있습니다. | Seumul-hana gaeui munjega isseumnida. | There are 21 problems. |
| 스물하나 페이지를 읽었습니다. | Seumul-hana peijireul ilgeotseumnida. | I read 21 pages. |
Usage Rules for Korean Numerals
Proper usage of Korean numerals involves understanding when to use the Sino-Korean and Native Korean systems. Here are the key rules:
Rules for Using Sino-Korean Numbers
- Dates: Use Sino-Korean numbers for years, months, and days. Example: 2023년 12월 21일 (icheon isip-sam nyeon sibiwol isip-iril) – December 21, 2023.
- Money: Use Sino-Korean numbers for prices and amounts of money. Example: 21,000원 (iman cheon won) – 21,000 won.
- Phone Numbers: Use Sino-Korean numbers when reciting phone numbers. Example: 010-1234-5678 (gong il gong – il i sam sa – o ryuk chil pal).
- Addresses: Use Sino-Korean numbers for addresses and building numbers.
- Measurements: Use Sino-Korean numbers for measurements such as length, weight, and volume.
- Large Numbers: Numbers greater than 99 are almost always expressed using the Sino-Korean system.
Rules for Using Native Korean Numbers
- Age: Use Native Korean numbers when stating someone’s age. Example: 스물하나 살 (seumul-hana sal) – 21 years old.
- Counting Objects: Use Native Korean numbers when counting objects (up to 99). Example: 사과 스물하나 개 (sagwa seumul-hana gae) – 21 apples.
- Hours: Use Native Korean numbers for the hour when telling time, but Sino-Korean numbers for the minutes. Example: 9시 21분 (ahop-ssi isip-il bun) – 9:21.
Exceptions and Special Cases
There are some exceptions to the general rules. For example, when counting months, the Sino-Korean system is always used, even though you are counting objects (months).
Additionally, some counters require the use of one system over the other. It’s important to learn these specific counters and their associated number systems.
Common Mistakes When Using Korean Numerals
Here are some common mistakes that learners make when using Korean numerals:
| Incorrect | Correct | Explanation |
|---|---|---|
| 저는 이십일 살입니다. | 저는 스물하나 살입니다. | Using Sino-Korean numbers for age is incorrect. Use Native Korean numbers. |
| 사과 이십일 개 있습니다. | 사과 스물하나 개 있습니다. | Using Sino-Korean numbers for counting objects (less than 100) is incorrect. Use Native Korean numbers. |
| 9시 이십일 분 | 9시 이십일 분 | This is correct, use sino korean for minutes |
| 오늘 스물하나월 십일입니다. | 오늘 십이월 이십일일입니다. | Using Native Korean numbers for months and days is incorrect. Use Sino-Korean numbers. |
Practice Exercises
Test your understanding of Korean numerals with these practice exercises.
Exercise 1: Translate to Korean (Using Appropriate Number System)
Translate the following sentences into Korean, using the appropriate number system (Sino-Korean or Native Korean):
| No. | English Sentence | Answer (Korean) |
|---|---|---|
| 1 | I am 21 years old. | 저는 스물하나 살입니다. |
| 2 | The price is 21,000 won. | 가격은 이만 천 원입니다. |
| 3 | There are 21 books. | 책이 스물하나 권 있습니다. |
| 4 | My phone number is 010-1234-5678. | 제 전화번호는 공일공-일이삼사-오육칠팔입니다. |
| 5 | Today is December 21st. | 오늘이 십이월 이십일일입니다. |
| 6 | I bought 21 apples. | 사과를 스물하나 개 샀어요. |
| 7 | The time is 9:21. | 아홉 시 이십일 분입니다. |
| 8 | He lives on the 21st floor. | 그는 이십일 층에 살아요. |
| 9 | We need 21 chairs. | 의자가 스물하나 개 필요해요. |
| 10 | I will call back in 21 minutes. | 이십일 분 후에 다시 전화할게요. |
Exercise 2: Identify the Correct Number System
Determine whether the following situations require the Sino-Korean or Native Korean number system:
| No. | Situation | Answer (Number System) |
|---|---|---|
| 1 | Stating your age | Native Korean |
| 2 | Reciting a phone number | Sino-Korean |
| 3 | Counting apples | Native Korean |
| 4 | Saying the year 2023 | Sino-Korean |
| 5 | Describing the price of a car | Sino-Korean |
| 6 | Telling the hour | Native Korean |
| 7 | Telling the minutes | Sino-Korean |
| 8 | Giving an address | Sino-Korean |
| 9 | Counting months | Sino-Korean |
| 10 | Counting number of people | Native Korean |
Advanced Topics: Beyond Basic Numerals
For advanced learners, understanding counters and larger numbers is crucial. Here are some advanced topics:
Counters (단위)
Korean counters are words that specify the type of object being counted. They are used after the number and are essential for accurate counting.
Different counters are used for different types of objects (people, books, animals, etc.).
Examples:
- 명 (myeong) – for people: 스물한 명 (seumul-han myeong) – 21 people
- 권 (gwon) – for books: 이십일 권 (isip-il gwon) – 21 books
- 마리 (mari) – for animals: 스물한 마리 (seumul-han mari) – 21 animals
- 개 (gae) – general counter for objects: 스물한 개 (seumul-han gae) – 21 items
Large Numbers (큰 수)
The Sino-Korean system is used for large numbers. The key units are:
- 만 (man) – ten thousand (10,000)
- 억 (eok) – hundred million (100,000,000)
- 조 (jo) – trillion (1,000,000,000,000)
To express larger numbers, combine these units. For example, 100,000 is 십만 (simman) – “ten ten-thousands.”
Frequently Asked Questions
Here are some frequently asked questions about Korean numerals:
- Q: When should I use Sino-Korean numbers?
A: Use Sino-Korean numbers for dates, money, phone numbers, addresses, measurements, and numbers greater than 99. They are generally used in more formal contexts.
- Q: When should I use Native Korean numbers?
A: Use Native Korean numbers for age, counting objects (up to 99), and stating the hour when telling time. They are generally used in more informal contexts.
- Q: What happens if I use the wrong number system?
A: While you will likely still be understood, using the wrong number system can sound awkward or unnatural. It’s best to learn the correct contexts for each system to communicate effectively.
- Q: Are there any resources for practicing Korean numerals?
A: Yes, there are many online resources, including language learning apps, websites, and textbooks that offer practice exercises for Korean numerals. Look for resources that specifically focus on differentiating between the Sino-Korean and Native Korean systems.
- Q: How do I learn the different counters in Korean?
A: Learning counters requires memorization and practice. Start with the most common counters (명, 개, 권, 마리) and gradually expand your knowledge as you encounter new counters in context. Flashcards and spaced repetition can be helpful learning tools.
- Q: Is it okay to mix number systems in one sentence?
A: Yes, it is common to mix number systems in one sentence, especially when telling the time (using Native Korean for hours and Sino-Korean for minutes) or when stating age (Native Korean for age and Sino-Korean for years). The key is to understand which system is appropriate for each part of the sentence.
- Q: How do I pronounce Korean numbers correctly?
A: Pronunciation is crucial for understanding and being understood. Listen to native Korean speakers pronounce the numbers and practice mimicking their pronunciation. Pay attention to the vowel sounds and consonant clusters, which can be different from English. Online dictionaries and language learning apps often provide audio pronunciations.
- Q: Are there regional variations in the use of Korean numbers?
A: While the basic number systems are consistent across South Korea, there might be slight regional variations in pronunciation or usage. However, these variations are generally minor and should not significantly impact your ability to understand or be understood. Focus on learning the standard pronunciations and usages first.
Conclusion
Mastering Korean numerals, especially knowing how to say “21,” requires understanding the distinction between the Sino-Korean and Native Korean number systems. Each system has its specific contexts and usage rules.
By familiarizing yourself with these rules and practicing regularly, you can confidently and accurately express numbers in Korean. Remember to pay attention to the context, learn common counters, and practice pronunciation to enhance your fluency.
Consistent practice and exposure to the language will solidify your understanding and improve your overall communication skills in Korean.