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

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