Brad's Books and Organizations





Hi, I’m Brad Feld, a managing director at the Foundry Group who lives in Boulder, Colorado. I invest in software and Internet companies around the US, run marathons and read a lot.

« swipe left for tags/categories

swipe right to go back »

How Many Ways Can You Calculate 2010?

Comments (234)

Here’s an easy one: 1+2-(3-4-5)*6*7*8-9

How about 1*(2+(3-4*(5/6-7))*8)*9

Or maybe 1+2345*6/7+8-9

Or (1-(23+4)*5)*(6/(7-8)-9

Maybe .1+23*(45+6*7)+8+.9

Even 1-(.2+(3+.4)*(5+67))*(.8-9)

If you love numbers and are excited about 2010, you’ll get a kick out of the cool 2010 page by Nadav Samet (surprise – he works for Google.)  (Thanks SMoody!)

101010 – Fun With Numbers

Comments (322)

I love numbers.  I was thinking about numbers and dates on my run yesterday.  Here’s a few fun ones for you.

101010 – On 10/10/2010 the answer the life, the universe, and everything will be revealed.

030309 – Isn’t it fun to have square root day be “prime square root day”?  How many of them are there in the 21st century?  How about 02/02/04, 03/03/09, 05/05/25, 07/07/49.  That would be five.  So there are a prime number of prime square root days.

090909 – Number 9, Number 9, Number 9 is the day that the Beatles version of Rock Band is released.  As a special bonus it’s the second day of my Q3 off the grid vacation.

Got any other good ones for me?

Unix Time = 1234567890 On Valentine’s Day

Comments (390)

There are so many reasons to love Valentine’s Day.  My favorite is that on 2/14/09 the Unix Time will be 1234567890.  This happens at exactly 00:31:30 CET.  Yeah – it’s a little bit of a cheat since CET = GMT+1 and – correspondingly – it will still be 2/13/09 in the United States.  Just another good reason to go to Paris for Valentine’s Day.  (Thanks ScottM).

A Bad Ass Fucking Fractal

Comments (7)

Yes – those are the lyrics – buried at about 2:05.  Who said mathematicians don’t know how to rock.

Thanks Ryan.  Cornell just went up a notch in my book.

At Least I Was Going 0 MPH This Time

Comments (2)


Exactly 20,000 miles.  What numerical fun!

Build something great with me