Numbers that sound alike are told apart by stress and by context. Learn the stress pattern for the teen and ty pairs, then use the topic to check your answer.
This lesson is part of listening skills. It follows predicting information from question wording, because predicting a number tells you to listen for one.
Which pairs cause the most confusion?
Five pairs cause most of the slips:
| Pair | How to tell them apart |
|---|---|
| 13 and 30 | thir-TEEN is long at the end, THIR-ty is short at the end |
| 14 and 40 | four-TEEN has a clear “t” and “n”, FOR-ty is quick |
| 15 and 50 | fif-TEEN ends strongly, FIF-ty ends softly |
| 16 and 60 | six-TEEN, SIX-ty |
| 18 and 80 | eigh-TEEN has a longer end, EIGH-ty is quicker |
Dates are a second trap, because “second” and “twelfth” can sound close on a fast recording. Listen for the clear “f” sound in “twelfth”.
Worked example: a travel announcement
Script (have someone read it aloud): “The bus to the science fair leaves from stand 15 at ten to four on the 13th of March. The fare is RM30 for each student.”
Ask four questions.
Which stand? Fifteen, not fifty, because the teen ending is strong. What time? Ten to four, which is 3:50.
Which date? The 13th, which ends strongly. What fare? RM30, where the stress is on the first syllable.
| Detail | Heard | Check |
|---|---|---|
| Stand | 15 | strong ending, teen |
| Time | 3:50 | “ten to four” |
| Date | 13 March | teen ending |
| Fare | RM30 | stress on “thir” |
Context helps too. For a long trip, a fare of RM30 sounds more sensible than RM13, so a quick sense check supports your choice.
The mistake that costs marks
The common slip is to write the first number you think you heard without checking the stress. The answer looks neat, so the error is hard to spot.
| Heard | Wrong | Right |
|---|---|---|
| stand fifteen | 50 | 15 |
| RM thirty | 13 | 30 |
| ten to four | 10.04 | 3.50 |
The fix is to listen for the stress, write the digits straight away, and do a quick sense check.
How do I practise?
Ask a partner to read five pairs aloud in random order while you write the digits. Then swap. Keep a small list of the pairs you mix up.
Five minutes a day is enough to make these pairs easier.
Check yourself
Script (read aloud): “Room 14 is booked for the fortieth student, and the class starts at eighteen minutes past nine.” Write the room number and the time.
Answer
Room 14. The time is eighteen minutes past nine, which is 9:18.
The word “fortieth” is a distractor, and “eighteen” has the strong teen ending.
What to study next
Continue with following changes of mind and corrections. Practise with the original listening practice player. If you would like a teacher to drill the pairs you mix up, see online one-to-one English tuition.