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

Quick Square

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.

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Comments for Quick Square Average Rating Click here to add your own comments

Rating 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 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 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.

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