CNN.com- Police: Trayvon Martin's death 'ultimately avoidable'
- Man questioned in highway killings
- Flesh-eating infections: Scores per year
- Travolta accuser hires Gloria Allred
- Court upholds Mississippi pardons
- Facebook IPO: Internet glee, skepticism
- Do voters want moderates out of D.C.?
- Now it's the jury's turn in Edwards trial
- Breyer's D.C. home hit by burglary
- Opinion: Dimon's $23M isn't the problem
- BBC
- VIDEO: Help offered on bringing up baby
- China jails smuggler Lai for life
- Airport starts search for new MD
- Dementia patient 'had 106 carers'
- Quarter of buses have problems
- 'Escalator tore off my big toe'
- Sex offenders get police cautions
- VIDEO: Malawi babies who are fighting to grow
- VIDEO: UK prepares for Olympic flame arrival
- VIDEO: G8 leaders to meet at Camp David
- AL JAZEERA ENGLISH (AJE)
- 'Disco queen' Donna Summer dies at 63
- Facebook to go public in $104bn flotation
- Tunisia-uprising injured sew lips in protest
- DR Congo troops shell rebel bases
- UN chief blames al-Qaeda for Syria bombings
- China jails fugitive smuggler for life
- Mladic trial postponed over 'errors'
- Fitch downgrades Greece on euro exit fears
- New French cabinet takes pay cut
- Obama unveils 'new chapter' in Myanmar ties
Daily Archives: August 13, 2009
Burning Rope Problem
You have two ropes that each burn for 1 hour end to end, but at varying rates. You have a lighter. You cannot cut the ropes (and doing so wouldn’t help, since they burn at unknown rates and you only … Continue reading
8 Bricks Problem
You have 8 bricks, but one of them is lighter than the rest.
You have a balance you can only use twice.
How do you find the lighter brick? Continue reading
Monty Hall Problem
There are 3 doors. There is a prize behind one door. You pick one at random. Then, a single wrong door is eliminated. Should you switch your answer to the other door?