EPS-TOPIK Listening Traps: 5 Number and Time Patterns That Cost You Points

Introduction

You have probably had this experience: you knew the vocabulary, you understood the sentence, and you still got the listening question wrong. Numbers and time expressions are usually the reason. They pass through a sentence in a fraction of a second, and you cannot rewind. In EPS-TOPIK, the audio plays only once on the PBT (Paper-Based Test), and one or two times on the CBT (Computer-Based Test) depending on the item — which means real-time number recognition has an outsized effect on your score (Source: HRD Korea, EPS-TOPIK Candidate Guide, 2025).

There is a specific linguistic reason numbers are so hard. Korean uses two parallel counting systems: native Korean numerals — 하나, 둘, 셋 (hana, dul, set / "one, two, three") — and Sino-Korean numerals — 일, 이, 삼 (il, i, sam / "one, two, three"). Which system you use is decided automatically by the counter (the noun that follows). Add time, prices, and large numbers on top of that, and you have a listening minefield.

This article covers five patterns that come from that structure:

1. Sentences where native and Sino-Korean numerals are mixed together
2. Time expressions, where 시 (si / "hour") and 분 (bun / "minute") use different systems
3. Large numbers grouped by 만 (man / "ten thousand") and 억 (eok / "hundred million")
4. Digits that sound alike — 사 (sa / "4") vs. 삼 (sam / "3"), 이 (i / "2") vs. 십이 (sibi / "12")
5. Real-exam sentence patterns where price, discount, and quantity collide in a single line

Pattern 1 — Native vs. Sino-Korean Numerals in the Same Sentence

Korean chooses a numeral system based on the counter that follows.

The trap appears when both systems show up in the same sentence.

Example A

사과 다섯 개에 삼천 원이에요. (Sagwa daseot gae-e samcheon won-ieyo. / "Five apples for 3,000 won.")

Here, 다섯 (native) attaches to 개 (counter for objects), while 삼천 (Sino-Korean) attaches to 원 (won). If you accidentally swap the numerals — hearing something like "three apples for five thousand won" — you get the answer wrong instantly.

Listening tip

• Train yourself to lock onto the counter noun (개, 명, 원, 시, 분, 층) first, and let that trigger a reflex about which numeral system should be in front of it.
• If you miss the counter, you cannot even reconstruct the number. Attention on the counter comes before attention on the digit.

Pattern 2 — Time: Hours and Minutes Use Different Systems

Time expressions appear in almost every EPS-TOPIK listening test. The trap is that 시 ("hour") and 분 ("minute") use different numeral systems in the same short sentence.

• 시 (hour): always native — 한 시, 두 시, 세 시, 네 시 (han si, du si, se si, ne si / "1, 2, 3, 4 o'clock")
• 분 (minute): always Sino-Korean — 일 분, 이 분, 삼 분, 사십 분 (il bun, i bun, sam bun, sasip bun / "1, 2, 3, 40 minutes")

Example B

회의는 세 시 사십 분에 시작합니다. (Hoe-ui-neun se si sasip bun-e sijakhamnida. / "The meeting starts at 3:40.")

세 (3, native) and 사십 (40, Sino-Korean) sit right next to each other. Test-takers often mishear this as "3:30" or "4:40." The 3-vs-4 confusion is especially common because 세 (se / "3") and 네 (ne / "4") differ only by their initial consonant.

Listening tip

• Drill the rule until it is automatic: hour = native, minute = Sino-Korean. No exceptions in normal conversation.
• Learn 반 (ban / "half") as a fixed expression: 두 시 반 (du si ban) means "2:30."
• One exception to keep in mind: the 24-hour clock used in announcements and broadcasts — 십사 시 (sipsa si / "1400 hours") — uses Sino-Korean numerals even before 시. You may hear this on transportation or public announcement audio.

Pattern 3 — Large Numbers: Where the Digit Count Collapses

Korean groups large numbers by 만 (10,000), not by the thousand. If you learned math in a language that groups by thousands, this structure does not translate directly and becomes one of the biggest sources of listening errors.

Example C

월급은 삼백만 원입니다. (Wolgeup-eun sambaengman won-imnida. / "The salary is 3,000,000 won.")

If you hear 삼백만 (3,000,000) as 삼백 (300) or 삼십만 (300,000), you are off by three or more digits. This exact error shows up repeatedly in salary, price, and remittance questions on EPS-TOPIK listening.

Listening tip

• Mentally draw a divider at the 만 mark as you listen: 삼백만 → "300 | 만" → 3,000,000. Practice until the split happens automatically.
• The moment the audio pauses, write the number in Arabic digits on your scratch paper (PBT) or scratch area (CBT). Do not try to hold multi-digit numbers in your head through the next sentence.

Pattern 4 — Look-Alike Digits: 4 vs. 3, 2 vs. 12

Sino-Korean numerals are short — often a single syllable — and several of them overlap in ways that native ears filter out but learners do not.

Example D

가격은 십이만 원입니다. (Gagyeok-eun sibiman won-imnida. / "The price is 120,000 won.")

If 십 gets swallowed in the audio, 십이만 (120,000) becomes 이만 (20,000) in your head — a full digit gone. The reverse also happens: you expand 이만 to 십이만 when you were not sure and defaulted to the longer form.

Listening tip

• Train specifically on the leading digit — 십, 백, 천, 만. Native speakers naturally under-articulate these leading syllables; you need to get used to that rhythm rather than expect emphasis.
• Cross-check with context. 이만 원 (20,000) and 십이만 원 (120,000) belong to very different price ranges. Ask yourself whether the surrounding noun (apples, a shirt, monthly rent) makes sense at that price point.

Pattern 5 — When Price, Discount, and Quantity Stack Up

A sentence with a single number is actually the easy case. The real EPS-TOPIK trap is when two or three numbers stack up in the same sentence. Conversational listening items regularly combine price, discount, and quantity in one line.

Example E

이 티셔츠는 원래 삼만 원인데, 오늘은 오천 원 할인해서 이만 오천 원이에요. (I ti-syeocheu-neun wollae samman won-inde, oneur-eun ocheon won harin-haeseo iman ocheon won-ieyo. / "This T-shirt was originally 30,000 won, but with a 5,000 won discount today, it's 25,000 won.")

One sentence, three numbers (30,000 / 5,000 / 25,000), three concepts (original price / discount / today's price). The question usually asks one of the following:

• How much does it cost today?
• How much is the discount?
• What was the original price?

Listening tip

• Lock onto the role markers before the digits: 원래 (wollae / "originally") = original price, 할인 (harin / "discount") = amount taken off, 오늘 (oneul / "today") or the location particle ~에 signals today's price.
• If you do not have time to write down all three numbers, glance at the question stem first and figure out which number you need before the audio starts. On the CBT, the question and audio appear together, so this pre-scan strategy is especially effective (Source: HRD Korea, EPS-TOPIK CBT Guide, 2025).

Wrapping Up

Number and time expressions are the section where grammar knowledge does not save you. Only trained listening reflexes do. Here are the five patterns again, condensed:

1. Lock onto the counter noun first, and let it decide the numeral system.
2. Hour = native, minute = Sino-Korean. Make it automatic.
3. Draw a mental divider at 만 to keep the digit count straight.
4. Practice catching the leading digit (십, 백, 천, 만) — that is where the confusion pairs collapse.
5. In multi-number sentences, catch the role markers (원래, 할인, ~에) before the digits.

In your next study session, figure out which of these five you miss most often, and drill listening items concentrated on that specific pattern until the reflex takes over.

Practice with SEDA

Listening items that hinge on numbers and time expressions show up throughout SEDA's type-based practice sets. When you miss one, save it to Review Notes — you will get spaced reminders at D+3, D+7, and D+30 to hit the same pattern again until the listening reflex is fully wired in.

Download SEDA — free on iOS and Android

References

1. HRD Korea, "EPS-TOPIK Candidate Guide," 2025, https://www.hrdkorea.or.kr
2. HRD Korea, "EPS-TOPIK CBT Test Guide," 2025, https://www.eps.hrdkorea.or.kr