Skip to content

Success Tutoring Games

Sign in

85 in words

85

eighty-five

85 is written eighty-five.

Ways to write it

As an ordinal: eighty-fifth
Roman numeral: LXXXV
Expanded form: 80 + 5

Place value

Place	Digit	Value
tens	8	80
ones	5	5

Number facts

Even or odd: Odd
Prime or composite: Composite
Factors: 1, 5, 17 and 85 (4 factors)
First 10 multiples: 85, 170, 255, 340, 425, 510, 595, 680, 765, 850
Square: 85 × 85 = 7,225
Square root: ≈ 9.22
Sum of the digits: 8 + 5 = 13
Rounded to the nearest 10: 90
Number before: 84
Number after: 86
In binary: 1010101

Quick check

What number comes just after 85?
Show the answer
86
Is 85 even or odd?
Show the answer
Odd
What is 85 + 10?
Show the answer
95

Practise 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

Practise any times table from 2× to 12×.

Frequently asked questions

How do you write 85 in words?

85 is written "eighty-five".

Is 85 a prime number?

No. 85 is a composite number, because it has more than two factors.

What are the factors of 85?

The factors of 85 are 1, 5, 17 and 85.

How do you write 85 in Roman numerals?

85 in Roman numerals is LXXXV.