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Lesson 3: Math patterns

# Math patterns: table

Sal explains a pattern with the number of seats at a table. Created by Sal Khan.

## Want to join the conversation?

• From 18 to 22, the difference is 4, not 5. ERROR!
• The correct answer would be 23
(1 vote)
• Sal, I think you made a mistake at the very end, it's supposed to be 23. Cause you're adding 5 to 18 and so you should be able to fit 23 because 5 + 18 is 23.
• @ in the video, there is a correction box that displays to tell you that Sal meant to write +4, not +5. Since 18+4 = 22, the final result is correct.

Note: You can only see correction boxes if you don't watch in full screen mode. So, anytime you think there is an error, drop out of full screen mode and look for a correction box.
• How did they come up with them.
• What if you had zero or a half of a table ? What about negative tables?
• how would you even reach a negative number of tables? And if it is zero tables then zero people can fit in.
• um who made this up
• Sal makes all the math videos on Khan Academy
(1 vote)
• i love kan acedemy so much
• Me too.
(1 vote)
• Im an ai totally not lieying
• at , Sal says +5 but i don't understand why