Subscription

Books
Shop
About

Friday, September 10, 2010

Matrices for shop-keepers

In Nigerian folklore,
someone called out to a young child, "Emeka what is four plus four?"
The child, frowning, said "eh, I don't know."

The same person asked, "Emeka, what is four naira plus four naira?"
The kid proudly announced, "ahahn, that na eight naira now!"

I think Seun told me this joke.
Let's learn matrix multiplication. Can you solve this?

If you're like Emeka, think of the above matrix multiplication as:

If you can write in matrix form all your:
eggs from two shops, milk from two shops, and sugar from two shops in three columns,
then you can do the following matrix multiplication:

No comments:

Post a Comment

Blog Archive

My Other Blogs

  • the #unga - The 80th session of the United Nations' General Assembly. The theme of session is ‘Better Together: 80 years and more for peace, development and human righ...
    1 week ago
  • yum yum yum ๐Ÿ˜‹ - Tinie Tempah and Skepsis: *Eat It Up* South Park: Gluten-Free comedy sketch NEWSBUKA for all the burning topics in Nigerian society and beyond. GeT F...
    1 week ago
  • the answer - * where does happiness come from * where does happiness come from * where does happiness come from * Want fine African Literature? (Preview) Nigerian ...
    2 weeks ago
  • One dream ends - I asked AI to make a flag. (Second attempt) *Twenty years ago*, I was living in California, missing Nigeria, and so I created this blog, UpNaira, my se...
    4 months ago
  • It's time... - but don't go away. Keep up with my other blogs. Read my books. Stay mathy. ✌
    2 years ago

About Me

Followers