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How to shark a 'guess the number of M&Ms in a jar' contest...

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Uploaded by on Mar 19, 2009

A video on a challenge that I set for my third year solid state physics class (PHYS3080).

Video posted for use under Creative Commons Licence - by-nc-sa

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Science & Technology

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Standard YouTube License

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Uploader Comments (micolich)

  • what happens if they have different types of m&m's like crunchy m&ms(very much spherical) and regular ones, could you figure out the amount if you knew the percentage of crunchy ones?

  • @reubensugars Should be able to.

  • (Volume of jar divided by volume of m&m) times packing fraction for all those who don't know where he got the number. (1150 / 0.715) x 0.665 = 1069.31608 or ~1070.

  • @Thecommander248 Yep, that's right. Thanks. :)

  • Interesting, but if you are going by mass, doing it with a single MNMs is silly. But what about simply weighting 2-3 batches of 50 MNMs (which you sould be able to measure with reasonable accuracy on a standard scale) and using the average to establish the standard weight of a MNM? Besides, actually counting by hand a large number of small items can easily go wrong.

  • @sylverdrag Not if you count it three times to be sure ;)

Top Comments

  • Are you aware this is a university course? For him to even be holding a fun contest like that is uncommon.

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  • lol, had once such a contest, they put in a brick in the middle that couldn't be seen.... To twart this kind of calculations and give more chance for random guess.

  • nice shirt

  • I won approximately 10,000 M&Ns doing this method. Was about 25 off I think. Thank You!!

  • Do you know the packing factor of Peanut M&Ms

  • That was AMAZING!!!

  • When I was younger i entered a contest with Peanut M&M's in a jar. I figured that each piece was one unit so I counted the number of pieces in a column and the number of pieces in the diameter and did (pi*r)^2 * h where h = the results from the column. I won the contest and was off by 6 m&m's :)

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