Numbers in English are one of the most practical subjects for any beginner.
We use them all the time – for hours, prices, age, dates, phones and what not.
And although they seem easy, many people wonder:
How are numbers after 20 formed?
Why do 13 and 30 sound so different?
Is there logic or is everything learned by heart?
The good news – there are very clear patterns.
The basic numbers from 0 to 10
These are the numbers on which everything else is built:
zero – 0
one – 1
two – 2
three – 3
four – 4
five – 5
six – 6
seven – 7
eight – 8
nine – 9
ten – 10
👉 These shapes are easy to remember.
Numbers 11 to 19 (special group)
Here begins the first model:
eleven – 11
twelve – 12
thirteen – 13
fourteen – 14
fifteen – 15
sixteen – 16
seventeen – 17
eighteen – 18
nineteen – 19
👉 Notice the ending -teen → means “ten +”.
The tens (very important)
The following key model:
twenty – 20
thirty – 30
forty – 40
fifty – 50
sixty – 60
seventy – 70
eighty – 80
ninety – 90
one hundred – 100
👉 Here is the ending -ty, no -teen.
How are the numbers between the tens formed
This is the easiest part of the whole system.
We simply combine:
ten + one
twenty-one – 21
thirty-five – 35
forty-two – 42
sixty-seven – 67
👉 In writing we use a hyphen.
Common mistake: 13 vs 30
This is a classic for all beginners.
thirteen – 13
thirty – 30
The difference is not only in the spelling, but also in the accent:
thirteen (strong end)
THIRty (strong start)
The same goes for:
fourteen vs forty
fifteen vs fifty
How to use numbers in sentences
I am twenty years old.
She has three brothers.
The price is fifty euros.
We have two meetings today.
Numbers are everywhere in real language.
How to remember them more easily
Instead of learning all the numbers one by one:
✅ learn well 1–10
✅ learn the tens
✅ combine them freely
Once you understand the logic behind the numbers in english, you will be able to easily form almost any number up to 100.
A little test for you
Which is correct?
twenty-three
twenty three
✔️ Both are possible, but the standard spelling is:
twenty-three
What to remember
Numbers 1–10 are the base
13–19 end at -teen
The tens end in -ty
Intermediate numbers are a combination
13 and 30 are NOT the same 😄
The pattern is logical, not chaotic
Tip: Don’t just learn numbers visually. Say them out loud — especially groups like thirteen / thirty and fourteen / forty. The ear gets used to it faster than the memory.
More topics for beginners
In the blog of English Motivator you will find other clear explanations of English vocabulary for beginners.