### 9 November 2008 Revisited

9 November 2008 was the 314th day of 2008. 19 years ago, on November 9th, the fall of the Berlin Wall took place, which was the 313th day of 1989. 9 November 2009 marks the 20th anniversity of the fall of the Berlin Wall. The day after 9 November 2009 (i.e. 11/10/09) is a counting-backward BAD (Basic Arithmetic Date).

##### Exercises
1. `314` is semi-prime (i.e. it has only two prime factors). The prime factors for `314` are `_____` and `_____`.

2. `313` is a prime number; in other words, it has only two proper divisors and they are `_____` and `_____`.

3. `313` is `_______%` less than `314`.

4. `314` divided-by `______` equals `3.14`, which is Pi rounded to the nearest `__________________`.

5. `313` is a twin prime with `_____`. Note: Twin primes are prime numbers that differ by two.

##### Update::2009.11.09

9 November 2009 was the 313th day of the year.

MathBabbler posted the following tweet to his @nanofoo Twitter account on 11/9/2009.

```   http://twitpic.com/od0vd (Berlin wall) replica at the
"Wings Of Peace And Freedom Park" in Dixon, Illinois
```

The following is a quote from Thomas Friedman's book "The World is Flat."

```   "Yes, the world became a better place to live in after 11/9,
because each outbreak of freedom stimulated another outbreak."
```

9 November 2009 as a BAD...

```   11/09/09:  (11 + 9) * 9 degrees = Pi radians
11/09/09:  (119)9 = 9
```

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 01 December 2008