Current time:0:00Total duration:12:09

0 energy points

# Forehead numbers brain teaser

The perfect logicians are at it again. Created by Sal Khan.

If you're seeing this message, it means we're having trouble loading external resources for Khan Academy.

If you're behind a web filter, please make sure that the domains ***.kastatic.org** and ***.kasandbox.org** are unblocked.

Main content
# Forehead numbers brain teaser

Current time:0:00Total duration:12:09

0 energy points

The perfect logicians are at it again. Created by Sal Khan.