Do you know?

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Do you know the difference
between blues and jazz?
Blues musicians play three chords in front of 100 people.
Jazz musicians play 100 chords in front of three people.
(Leah Garchick sfgate.com)
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I looked up "difference between blues and jazz"
on Google and found a few opinions:
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* When you put the bridge in the song it becomes jazz,
take it out and it's blues.

* Question:
I can't quite figure out where the line gets drawn between
world music, Latin music, folk music, jazz and blues.
* Answer:
In reality, the lines between different sorts of ethnic and traditional musics are nebulous and constantly changing. Everything not Pop or Rock music will fall into these categories: Latin music, alt.country, bluegrass, folk-rock, jazz. Confused about the difference between jazz or blues? Blame the musicians!
You'll have to ask those guys how they divvy it up! They insist on making pesky genre-bending music, but there would be very little music around today if it weren't for the millennia of musical innovation that this world has seen.

* The main difference between jazz music and blues music:
Blues songs a pentatonic scale is used frequently. Chromatic scales are popular in contemporary jazz and traditional jazz is very open about the different scales that can be used and the scales often change mid piece.

* The simple answer:
Jazz is more complicated, uses many more chords, scales, modes, tempos, time signatures, melodic structure, moods, styles, etc. Blues has one basic structure and once you vary too much from that it isn't blues anymore.

* Jazz Cats do play blues; jazz came from Blues.
Often when Jazz guys play a straight blues they will put "blues" in the song title. Jazz is not necessarily "one big solo" as there are many "standard" songs that "state the melody" and play variations off it, usually improvised. But there are also "jazz pieces" which have a precisely written score like Gershwin's Rhapsody in Blue".