Regifting Robin

This math puzzle has been sent to me in the past few years by a number of people:

http://www.regiftable.com/RegiftingRobinPopUp.html

It appears that Robin can read your mind! Right over the internet! Amazing!

But not really, as it’s based on a simple mathematical trick.

See if you can figure out the mathematical trick before you search for the solution, which is probably all over the internet. (As usual, it’s the struggle to solve the problem that develops your mind; even if you don’t solve the problem, striving to do so prepares your mind so that you will better understand and remember the solution even if you have to look it up.)

Have fun!

Advertisements

About Santo D'Agostino

I have taught mathematics and physics since the mid 1980s. I have also been a textbook writer/editor since then. Currently I am working independently on a number of writing and education projects while teaching physics at my local university. I love math and physics, and love teaching and writing about them. My blog also discusses education, science, environment, etc. https://qedinsight.wordpress.com Further resources, and online tutoring, can be found at my other site http://www.qedinfinity.com
This entry was posted in Math puzzles. Bookmark the permalink.

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