A Two Digit Number and Its Reverse Sums to a Multiple of 11

Just something I figured out this evening. Nothing big or fancy. Some examples:

12+21 = 33 (33/11 = 3)

96+69 = 165 (165/11 = 15)

55+55 = 110 (110/11 = 10)

Also, if you sum the digits (5+5, 8+6, 1+2) you get the other factor that is combined with 11 to make the sum.

Example: 96+69 = 165

9+6 = 15

165/11 = 15

Pretty cool, right?

Advertisements

One comment on “A Two Digit Number and Its Reverse Sums to a Multiple of 11

  1. […] As you can see in my previous post A Two Digit Number and Its Reverse Sums to a Multiple of 11, if you have a two digit number, you […]

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s