This is a famous brain teaser which supposedly first appeared in R. M. Abraham’s Diversions and Pastimes in 1933. The version below was taken from Answers.com

Three ladies go to a restaurant for a meal. They receive a bill for $30. They each put $10 on the table, which the waiter collects and takes to the till. The cashier informs the waiter that the bill should only have been for $25 and returns $5 to the waiter in $1 coins. On the way back to the table the waiter realizes that he cannot divide the coins equally between the ladies. As they didn’t know the total of the revised bill, he decides to put $2 in his own pocket and give each of the ladies $1.

Now that each lady has been given a dollar back, each of the ladies has paid $9. Three times 9 is 27. The waiter has $2 in his pocket. Two plus 27 is $29. The ladies originally handed over $30. Where is the missing dollar?

I’ve seen lots of longwinded explanations for this puzzle; can anyone post concisely what really happened to the missing dollar?

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If you’ve ever tried to chew Vivarin instead of swallowing it, you’re well aware of the fact that caffeine- as available in its raw form- has a horrible, bitter taste.

A molecular biologist who owns a coffee shop in North Carolina, however, has figured out a way to turn caffeine into small, flour-like particles and eliminate the bad taste so it can be added to baked goods like donuts, cakes, and pastries.

Currently, he’s getting a patent on the process and trying to see if Starbucks and Krispy Kreme might be interested.

Is this something you’d eat?

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“Watch your thoughts,
they become words.

Watch your words,
they become actions.

Watch your actions,
they become habits.

Watch your habits,
they become character.

Watch your character,
it becomes your destiny.”

-Unknown

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This question has actually been asked at job interviews (Microsoft, for example) and on math final exams in college.

It’s fairly difficult.

There are two lengths of rope.
Each one can burn in exactly one hour.
They are not necessarily of the same length or width as each other.
They also are not of uniform width (may be wider in middle than on the end), thus burning half of the rope is not necessarily 1/2 hour.

By burning the ropes, how do you measure exactly 45 minutes worth of time?

Feel free to post your answer in the comments section. Don’t look, though, until you really give it a try!

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Over the past 4 years, I’ve eaten a lot of dark chocolate, and some of the world’s best bars have made their way through our kitchen. Amedei, Valrhona, Michel Cluizel, El Rey, Domori, Bonnat. The nice thing about chocolate is that it is a very affordable luxury. You can grab yourself the world’s finest bar for less than $20.

Besides tasting great, there’s been a bunch of research over the past couple years showing dark chocolate may actually have some health benefits. For example, studies have shown dark chocolate can lower the “bad” LDL cholesterol, as well as blood pressure in patients with hypertension. And for those interested in improving cognitive performance, please see an earlier Smartkit post about how dark chocolate can boost brain power by improving verbal and visual memory, as well as reaction time. What I haven’t really posted about yet, however, is chocolate’s ability to induce euphoria. All varieties can do it, but I believe dark chocolate does it best. The numerous feel-good chemicals include:

• theobromine (a stimulant)
• anandamide (marijuana like substances)
• phenethylamine (aka PEA, “love drug”)
• caffeine
• and cocoa flavanols

This brings me to CocoaVia, a new chocolate bar put out by the Mars Company that is just starting to become readily available.

What is special about CocoaVia? Out of all the bars I’ve ever eaten, I’m close to concluding it packs the greatest feel-good punch. Thought it was a fluke the first time I tried it, but after having eaten about 10 over the past few weeks, I’m basically convinced.

What is unique about CocoaVia’s composition? The thing that made me want to go out and give it a try is that it’s processed differently from normal chocolate. Under normal manufacturing conditions, almost all of the health-giving plant chemicals (flavanols) are stripped right out. The Mars Company has apparently spent a fortune trying to figure out a way to create chocolate that still retains all these healthy flavanols. In the last year or two, they’ve succeeded, and their top-secret, specially processed flavanol-rich chocolate is called CocoaPro.

And CocoaVia is the world’s first chocolate bar made with CocoaPro.

If any of you chocoholics out there give it a try, I’d be very curious to hear if you notice a similar effect. Please feel free to let me know in the comments section what you think.

A note of caution, though: I personally don’t think CocoaVia tastes very good. Additionally, I’ve noticed a few pimples and zits eating CocoaVia- something that also commonly occurs with other Mars chocolates like Dove and M&M’s.

If you really want all the brain and health benefits that chocolate flavanols confer, you may prefer to go straight to the raw cacao beans. Most health food stores now sell these chopped in the form of cacao nibs.

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feel free to post what you think the answer is in the comments section

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