*** 20th Anniversary: 2003 to 2023 ***


Quick Square

A mathematical trick

A mathematical trick

Did you know that there is a quick way of squaring a two digit number which ends in 5?

Just multiply the first digit by that number plus one.... stick a 25 after your product and there's your answer .... simple ?

Example:

Q. What is 35 squared?
A. 3x4=12
.....now stick on the 25
...........the answer is 1225

Barry's Response - It even seems to work with three digit numbers (using the first two digit to make a two digit number) and plain old 5, using 0 as the first digit.

Oh the handy things we can do with math, games,conversions and tricks.

Search this site for more information now.

Comments for Quick Square

Average Rating starstarstarstarstar

Click here to add your own comments

Rating
starstarstarstarstar
I really wonder of this Techniques
by: Rajesh

I thought it would be good and it is really good and when i am going through all the tabs so then i am keep on getting all the tips from this site.

I understood that it is very useful can understand anyone easily so there several formulas if you follow but if you follow these you will find answers with in short time.

This is very interesting site and i really like to use many times and i got solved all the problems here.

Rating
starstarstarstarstar
Awesome
by: Anonymous

Haha, awesome! I didn't know about that trick. I wish we got taught little tricks like that in all my math classes in college.

Rating
starstarstarstarstar
Helpful hints
by: cangel

This is great. After all my years of teaching I was not aware of this little help. It just shows there is always something new to learn. And with sites like yours I can keep learning. I looked at the site about metric conversion and I am going to use it in my tutoring. Please keep up the good work. I have added your site to my favorites for browsing in the future. Thank you.

Click here to add your own comments

Join in and write your own page! It's easy to do. How? Simply click here to return to Math rules!.


ADD TO OTHER SOCIAL BOOKMARKS: add to Del.icio.usDel.icio.us add to DiggDiggadd to SpurlSpurl


Do you have concerns about air pollution in your area??

Perhaps modelling air pollution will provide the answers to your question.

That is what I do on a full-time basis.  Find out if it is necessary for your project.



Have your Say...

on the StuffintheAir         facebook page


Other topics listed in these guides:

The Stuff in the Air Site Map

And, 

See the newsletter chronicle. 


Thank you to my research and writing assistants, ChatGPT and WordTune, as well as Wombo and others for the images.

GPT-4, OpenAI's large-scale language generation model, helped generate this text.  As soon as draft language is generated, the author reviews, edits, and revises it to their own liking and is responsible for the content.