Ulam’s spiral: a spiral showing a neat (perhaps coincidental) pattern regarding prime numbers. Starting with 1 in the center, then spiral outwardly, increasing 1 for every dot. Circle the dots which are prime (black dots in this picture). The prime numbers will tend to appear along the diagonals.
I discovered that MIT posted over a thousand videos of their lectures on YouTube, with lots of the videos being science and physics related. I wish I was less tired so that I could watch them, but here’s a video for you guys to watch.
Jared Explains: Egyptian Multiplication
As seen in my previous post, it’s possible to multiply and divide numbers without using a times table! This is how the ancient Egyptians and the ancient Chinese worked with numbers, and it’s also how your computer handles multiplying numbers inside its processor. The Egyptian method of multiplication and division is important in computers so that they do not have to store an internal multiplication table.
How to multiply using binary numbers! Much easier to mutiply in base 2 than in base 10.