3-D Path Counting Brain Teaser

Extending the last Math thing about counting paths into three dimensions.

Path Counting Brain Teaser

A fun brain teaser looking at paths within a grid.

Another Competitive Math Problem

Another problem from the 2003 American Invitational Mathematics Examination.

Note: This video is from the fantastic Khan Academy collection of educational videos.

Light Bulb Switching Brain Teaser

Here's a classic brain teaser involving switches.

Note: This video is from the fantastic Khan Academy collection of educational videos.

Alien Abduction Brain Teaser

Another great brain teaser!

Note: This video is from the fantastic Khan Academy collection of educational videos.