This final post on different base systems show how binary (base 2) and Hexadecimal (base 16) became useful in the world of computers. Also discussed here is converting from any base to base 10 (decimal) and converting from base 10 to any base. Click on the underlined words below to see today’s post.
Different base systems, [...]

This is the second to three parts on different base systems. It will conclude tomorrow. Please click on the following to enlarge if needed.
 

Why do we use a base system for numbers? Why do we use base 10 (decimal system)? How does a base system evolve into our present number systems? These are some of the questions that we will answer over the next 3 days. Click on the image to enlarge if needed.
 

Drawing networks, without lifting you pencil off the paper or retracing your steps provide some neat puzzles. There is an interesting solution (see next week) but the ideas have far reaching uses. For example bus routes and garbage pick up routes use networks to make their routes more efficient. Have fun, but remember, this is [...]

Stop multiplying and dividing by five the old way!! Here is a couple of tricks for mental mathematics that allow you to get an answer is seconds in your head. I also throw in the proof for why it works. Quick what is 446 divided by 5 ? Too slow… read on…
 

Prime numbers are used in a variety of different ways, from finding divisors, to Lowest Common Multiples and Greatest Common Divisors, to cryptography, internet security and so on. This post will expand as time permits and new ideas come to my mind. Please click the sentence below to see the post.
Some uses of prime numbers

In about 350 BC, the Greek astronomer, geographer, historian and mathematician illustrated a method for sifting out the prime numbers from the whole numbers greater that one. Some computer programs use this method to find the prime numbers.
Prime Numbers and the Sieve of Eratosthenes

This is the third of three sessions on divisibility rules for whole numbers. It also includes a proof of why the rule for 11 works, and introduces you to a rule for divisibility for 7, complete with a proof!
Divisibility Rules, Part Three

This is the second of two parts of the common divisibility rules. The series concludes tomorrow.
 

Ever wonder how some people know really quickly what numbers go into a number?  Well for the next three days you will see the common divisibility rules, plus a bonus new one on Wednesday!!