### About the Number 10 (ten)

This BAB was created as a result of MathBabbler working on a BAB about Google turning 10 years young. MathBabbler was surprised when he discovered that he didn't have a BAB about the number 10.

```   MathBabbler Number Analyst (MBNA) output:
=========================================
10 is a natural, whole, integer
10 is even
10 proper divisors are: 1,2,5
10 is deficient (sum of divisors is 8)
10 is happy
10 is a Harshad number
10 is not prime
10 is undulating
10 has the prime factors: 2*5
10 in octal is 012
10 in hexadecimal is 0xa
10 in binary is 1010 (is evil)
10 nearest square numbers: -1...6 (9 ...16 )
sqrt(10) = 3.16228
ln(10) = 2.30259
log(10) = 1
10 reciprocal is .1
10! is 3.6288e+06
10 is 3.1831 Pi years
10 is 0 score and 10 years
```

`10` in Roman numeral is `X`.

We use the `base-10` (decimal) number system everyday.

With respect to number systems, `10n = n`.

A `10`-sided polygon is called a decagon.

I-`10` is a east/west interstate that passes through the Valley of the Sun and it connects Jacksonville, Florida with Santa Monica, California (~2460 miles). According to the Wikipedia, I-`10` was formed in 1957 (MathBabbler's birthyear).

By default, the `log(n)` function is base-`10`.

`10 years` is one decade and `10 years` is `one-tenth` of a century.

The metric system is based on powers of `10`.

`10^10 = 10 billion`.

`10` in hexadecimal (base-16) equals `A`.

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 07 September 2008 