The Beauty of Narcissistic Numbers

If you are a reader of Greek mythology, then you are probably familiar with Narcissus.  He was  a hunter of exceptional beauty that he died because he was unable to leave a pool after falling in love with his own reflection. That’s why I keep myself away from pools these days (kidding).

narcissus

Narcissus gazing at his own reflection (via Wikipedia)

In mathematics, he has kins by the name of narcissistic numbers — numbers that can’t get enough of themselves.  In particular, they are numbers that are the sum of their digits when raised to the power of the number of digits. » Read more

Week in Review – January 2012 Week 2

It’s a great Sunday morning, and despite my tiring Lesson Study session yesterday in Nueva Ecija (100 km from Manila), I’m back to  blogging. Here are the summary of posts for this week.

Mathematics and Multimedia

My Other Blogs

Have a blessed Sunday everyone.

Probability Terminologies and Notations

We had several discussions about probability and before we delve deeper on this topic, let us reinforce our knowledge by familiarizing ourselves with the terminologies and notations used.   This is in preparation to more discussions ahead. Aside from probability, we will also learn more about permutations, combinations, statistics and other related fields. The following are the common terms used in probability as well as the notations used in most textbooks.

Terminologies

Outcome

If a coin is tossed, when the coin comes to rest, it can show a tail or a head, each of which is an outcome.

Trial

Each roll of a die or toss of a coin is a trial.

Experiment

An experiment consists of one or more trials. » Read more

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