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10 in words

10

ten

10 is written ten.

Ways to write it

As an ordinal: tenth
Roman numeral: X
Expanded form: 10

Place value

Place	Digit	Value
tens	1	10
ones	0	0

Number facts

Even or odd: Even
Prime or composite: Composite
Factors: 1, 2, 5 and 10 (4 factors)
First 10 multiples: 10, 20, 30, 40, 50, 60, 70, 80, 90, 100
Square: 10 × 10 = 100
Square root: ≈ 3.16
Sum of the digits: 1 + 0 = 1
Rounded to the nearest 10: 10
Number before: 9
Number after: 11
In binary: 1010

Quick check

What number comes just after 10?
Show the answer
11
Is 10 even or odd?
Show the answer
Even
What is 10 + 10?
Show the answer
20

Practice with a game

Count with Me

Count pictures up to 5, 10 or 20 and compare groups.

Place Value Quest

Ones, tens, hundreds and thousands.

Times Tables Challenge

Practice any times table from 2× to 12×.

Frequently asked questions

How do you write 10 in words?

10 is written "ten".

Is 10 a prime number?

No. 10 is a composite number, because it has more than two factors.

What are the factors of 10?

The factors of 10 are 1, 2, 5 and 10.

How do you write 10 in Roman numerals?

10 in Roman numerals is X.