Category: interesting numbers

August 5, 2007

Can you Name this Mathematical Phenomenon?

Filed under: interesting numbers — Brian @ 3:58 pm

If you’re new here, you may want to subscribe to my RSS feed. Thanks for visiting!

I was just fooling around with some numbers, and realized that 13^2 (which gives you 169) is the reverse of 31^2 (which gives you 961 - which is the reverse of 169).

Is there any name for a number, the reverse of which, when squared, will also yield the reverse of the original number’s square?

Here’s another one:

    12^2=144
    21^2=441

Do you know any others? Possibly with other powers?
Anyone know any use for it? Please leave a comment if you do.