Business English Podcast · Phone & Video Calls · Episode 15

Clarifying a Number That Sounds Different over the Phone

Was that fifteen or fifty? How to say, dictate and check numbers on the phone safely — including the German traps "null" and "five and twenty".

B2 · Monologue · 4 Min. · free

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Editorially reviewed by James Simmonds – English teacher since 2004Published 25 September 2026

SceneOn the phone a number is dictated — and suddenly you are unsure: fifteen or fifty? Trainer Ben shows how professionals stress numbers, dictate them digit by digit and read them back to check.

0:00 / 4 Min.

Tip: listen to the episode twice before you start the test. · Worksheet (PDF)

✓ To the comprehension test

Ben — Business English trainer

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Transcript

The full transcript opens after the comprehension test — so you train real listening instead of reading along.

German support

BenQuick question: was that fifteen or fifty? If you've ever frozen on a phone call because a number didn't sound right, this episode is for you. Let's make sure you never book the wrong flight, order the wrong quantity or call the wrong number again.

BenThe classic problem pair is the teens and the tens: thirteen and thirty, fourteen and forty, fifteen and fifty. In the teens, the stress is on the end: fifTEEN. In the tens, it's on the front: FIFty. Say them with that stress and people will understand you the first time.

BenWhen you dictate a number, don't race. Give the digits one by one: 'My number is oh seven six, double two, nine five.' In British English, zero on the phone is usually 'oh'; two identical digits become 'double' — so 55 is 'double five'.

BenAnd here's a gift for my German listeners: the English word for the digit 0 in phone numbers is 'zero' or 'oh' — never 'null'. 'Null' sounds like a technical error message, not a phone number. Save it for football scores, where the British say 'nil' anyway.Am Telefon heißt die 0 „oh“ oder „zero“ – niemals „null“.

BenAnother German habit: twenty-five is NOT 'five and twenty'. I know, 'fünfundzwanzig' puts the five first — English doesn't. Always say the tens first: twenty-five, thirty-eight, ninety-four. And on the phone, digits are even safer: 'two-five'.25 heißt „twenty-five“ – nie „five and twenty“; am Telefon: „two-five“.

BenNow the most important habit of all: the read-back. When someone gives you a number, repeat it before you hang up: 'Let me read that back to you: oh seven six, double two, nine five.' It takes ten seconds and saves expensive mistakes.Zur Kontrolle wiederholen, bevor Sie auflegen.

BenIf you're the one checking, ask clean questions: 'Did you say fifteen — one-five?' or 'Sorry, was that thirteen or thirty?' Adding the digits in brackets, so to speak, removes all doubt.

BenOne more tip: with big money numbers, anchor them. 'That's one hundred and fifty thousand pounds — one-five-zero, three zeros.' Breaking a long number into small groups makes it much easier to catch on a bad line.

BenSo: stress fifTEEN but FIFty, say digits one by one, use 'oh' and 'double', always read numbers back — and leave 'null' and 'five and twenty' in the classroom. Your next phone number will land exactly where it should.

Key phrases

fifteen or fifty

the classic misheard number pair on the phone

Did you say fifteen or fifty? That changes the whole order.

phone number

the number used to call someone

Could you give me your phone number one digit at a time?

double five

the phone convention for two identical digits in a row

The code is double five, nine, three.

to read something back

to repeat information to confirm you heard it correctly

Let me read that back to you, just to be sure.

to hang up

to end a phone call

Repeat the number before you hang up.

to dictate a number

to say a number slowly so someone can write it down

Let me dictate the number slowly — don't race.

a bad line

a phone connection with poor sound quality

Sorry, you're breaking up — it's a bad line.

Did you say …?

the standard question for checking what you heard

Did you say thirteen or thirty?

Language notes

Was that fifteen or fifty? This episode shows how to stress, dictate and read back numbers on the phone safely — and which German traps ("null", "five and twenty") to avoid (level B2).

Stress and digit by digit

The distinguishing feature is stress: fifTEEN at the end, FIFty at the front. When dictating, play it safe and give the digits one by one: "oh seven six, double two, nine five". Here "oh" is the British telephone zero and "double" marks repeated digits. These conventions are not slang but professional standard — from the airport to the warehouse.

Reading back is not rude

In the UK and the US, reading numbers back is part of professional telephoning — in logistics, finance and customer service it is actively encouraged. Nobody is offended when you ask: "Did you say fifteen — one-five?" The real faux pas is staying silent and guessing. German phone culture tends to trust "understood already" — in English, double-checking reads as confident, not insecure.

The two German number traps

Trap one: the German "Null" is "oh" or "zero" on the phone — "null" sounds like an error message. Trap two: the German reversed-number system ("fünf-und-zwanzig") does not exist in English; it is always "twenty-five", never "five and twenty". To be completely safe on the phone, skip both traps and speak digits only: "two-five".

Keep practising: Learn business English online — with real teachers from Simmonds, since 2004.

Frequently asked questions

What language level is this episode for?

Level B2 (CEFR). The monologue uses clear trainer English with concrete speaking conventions; the vocabulary list explains all eight key phrases bilingually.

How do I say zero on the phone in English?

On the phone in British English: "oh" (like the letter O) or "zero" — never "null". The British use "nil" only for scores ("two-nil"), and "love" only exists in tennis.

What do I do if I did not catch a number?

Two professional tools: read it back ("Let me read that back to you: oh seven six …") and ask precisely with single digits ("Did you say fifteen — one-five?"). Both are standard practice and sound confident, not insecure.

Where can I practise telephoning in English live?

In the online business English courses from Simmonds Language Services: live lessons with real teachers on Zoom, for companies and individuals across Germany. Book a free consultation at englisch-lehrer.com/online — we will find the right course format for your goals.

Are the voices real?

Episodes are produced with high-quality AI voices (Hume) and editorially reviewed by our trainer team — the same method as our interactive lessons.

Want to practise these phrases in a real conversation?

The podcast trains your ear — in our online lessons you practise the conversation yourself, with real teachers. For companies across Germany since 2004.

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