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Country and language

Country and language: United States

Country and language

3 in words

3

three

3 is written three.

Ways to write it

As an ordinal
third
Roman numeral
III

Place value

PlaceDigitValue
ones33

Number facts

Even or odd
Odd
Prime or composite
Prime
Factors
1 and 3 (2 factors)
First 10 multiples
3, 6, 9, 12, 15, 18, 21, 24, 27, 30
Square
3 × 3 = 9
Square root
≈ 1.73
Rounded to the nearest 10
0
Number before
2
Number after
4
In binary
11

Quick check

  1. What number comes just after 3?

    Show the answer

    4

  2. Is 3 even or odd?

    Show the answer

    Odd

  3. What is 3 + 10?

    Show the answer

    13

Practice with a game

Count with Me

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

Frequently asked questions

How do you write 3 in words?

3 is written "three".

Is 3 a prime number?

Yes. 3 is a prime number: its only factors are 1 and 3.

What are the factors of 3?

The factors of 3 are 1 and 3.

How do you write 3 in Roman numerals?

3 in Roman numerals is III.