Fermi Questions C

nmurali2002
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Re: Fermi Questions C

Postby nmurali2002 » November 4th, 2018, 6:40 am

Heres another quizlet set that I made: https://quizlet.com/286400676/fermi-facts-flash-cards/

It's essentially a copy of the Wikipedia "orders of magnitude" pages for stuff like mass, length, energy etc. Those pages are really useful.

https://en.wikipedia.org/wiki/Category: ... _magnitude

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Re: Fermi Questions C

Postby Name » November 4th, 2018, 8:24 am

nmurali2002 wrote:Heres another quizlet set that I made: https://quizlet.com/286400676/fermi-facts-flash-cards/

It's essentially a copy of the Wikipedia "orders of magnitude" pages for stuff like mass, length, energy etc. Those pages are really useful.

https://en.wikipedia.org/wiki/Category: ... _magnitude


quick tip: don't just use the power of ten, also include the coefficent. For example the mass of a electron is 9.1*10^-31 kg not just -31, and would round to -30 if it just asked for mass of a electron
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Re: Fermi Questions C

Postby qazqwerty243 » December 10th, 2018, 10:47 am

Does anyone know of an accurate number for the number of grains of sand in the world? According to google it's 10^19, but google also says the Sahara along has 10^24 grains... so.... Can anyone help?

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Resources

Postby jkotl0327 » December 19th, 2018, 12:33 pm

Are there any good textbooks/resources (paid or free) for studying Fermí questions in general? Also, are there any such resources that list all of the pieces of information that it is helpful for study to prepare for this event (population of NY, size of a cell, etc.).
Thank you.

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Re: Fermi Questions C

Postby Name » December 22nd, 2018, 6:57 pm

jkotl0327 wrote:Are there any good textbooks/resources (paid or free) for studying Fermí questions in general? Also, are there any such resources that list all of the pieces of information that it is helpful for study to prepare for this event (population of NY, size of a cell, etc.).
Thank you.


Just take as many tests as you can. I've personally found the best way to do fermi is take tests, and after finishing the test, go over anything you got wrong (or sometimes even if you got it right), and figure out (and make sure you really understand) how to get the actual answer. Google whatever you don't know and memorize that so if you ever see the infomation again, you'll get it right. Tests generally ask similar style questions, so just get to know values that keep showing up.

Almost all resources i've found online has been mostly useless (fermiquestion.com was a good starter tool, rip that). Orders of magnitude on wikipedia is ok I guess but alot of the info is mostly irrelevant and is missing most of the more useful info. Idk about any possible textbooks, but i've never used them for fermi.

Edit:
qazqwerty243 wrote:Does anyone know of an accurate number for the number of grains of sand in the world? According to google it's 10^19, but google also says the Sahara along has 10^24 grains... so.... Can anyone help?

I use 19 because pretty much every test says 19. If it asks specifically for the sahara... im not sure what to go with.
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Re: Fermi Questions C

Postby jaggie34 » January 13th, 2019, 5:33 pm

Does anyone know what the top scores looked like for fermi at MIT?
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Re: Fermi Questions C

Postby Name » January 13th, 2019, 6:02 pm

jaggie34 wrote:Does anyone know what the top scores looked like for fermi at MIT?

I will update you with my score whenever I get my test back
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Re: Fermi Questions C

Postby jaggie34 » January 13th, 2019, 7:32 pm

Name wrote:
jaggie34 wrote:Does anyone know what the top scores looked like for fermi at MIT?

I will update you with my score whenever I get my test back


We got 111/200 which got us 12th
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Re: Fermi Questions C

Postby Unome » January 13th, 2019, 8:01 pm

jaggie34 wrote:Does anyone know what the top scores looked like for fermi at MIT?

I will take a guess that the top scores were in the 60-65% range. Fermi is pretty consistent.
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Re: Fermi Questions C

Postby Jjshan26 » January 15th, 2019, 2:07 pm

Unome wrote:
jaggie34 wrote:Does anyone know what the top scores looked like for fermi at MIT?

I will take a guess that the top scores were in the 60-65% range. Fermi is pretty consistent.


Wow, above is the true Fermi Master :o
I can confirm this would've gotten you a medal.
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Re: Fermi Questions C

Postby 48is2n » January 17th, 2019, 5:43 am

Yeah, 128/200 was good for 4th at MIT

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Re: Fermi Questions C

Postby eagerlearner102 » February 4th, 2019, 6:48 pm

Do you guys have any advice on getting +5 on an answer instead of +3? Somehow, I get a lot of +3. The answers are either 1 less or 1 more than the actual fermi answer.
Also, how do you try to improve? My scores seem to remain the same as they are around 50%.
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Re: Fermi Questions C

Postby Unome » February 5th, 2019, 6:48 am

eagerlearner102 wrote:Do you guys have any advice on getting +5 on an answer instead of +3? Somehow, I get a lot of +3. The answers are either 1 less or 1 more than the actual fermi answer.
Also, how do you try to improve? My scores seem to remain the same as they are around 50%.

50% is fairly good, although 65-70% was my usual goal at tournaments. I would recommend increasing the accuracy of your assumptions.
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Re: Fermi Questions C

Postby eagerlearner102 » February 5th, 2019, 10:03 am

Thank you, but the main issue is that I seem to not improve much despite studying flashcards on Quizlet and starring ones I can't remember. Maybe it is because I am taking harder tests.
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Re: Fermi Questions C

Postby Unome » February 5th, 2019, 10:17 am

eagerlearner102 wrote:Thank you, but the main issue is that I seem to not improve much despite studying flashcards on Quizlet and starring ones I can't remember. Maybe it is because I am taking harder tests.

I doubt it's about the test difficulty, unless the tests you're taking are absurdly difficult. Don't spend your time on Quizlet unless you're having trouble remembering the actual values you need - spend more time taking tests and figuring out your mistakes in reasoning through questions.
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