Paper/Pencil Problems

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GenePeer
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Re: Paper/Pencil Problems

Post by GenePeer » Mon Aug 12, 2013 12:18 am

Problem 202 (View Problem) - Great problem!
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Slaunger
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Re: Paper/Pencil Problems

Post by Slaunger » Thu Jan 09, 2014 8:45 am

Problem 142 was solved by Rolle in 1682, and later by Euler as well.
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Slaunger
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Re: Paper/Pencil Problems

Post by Slaunger » Tue Mar 18, 2014 4:32 pm

Problem 218 (View Problem) is doable by pen and paper as also noted by several in the problem thread.
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miracle173
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Re: Paper/Pencil Problems

Post by miracle173 » Sat Oct 25, 2014 2:59 am

I solved problem 27 in my head. Actually I did not prove that the polynomial I found is optimal but I entered my solution and it was accepted. I published the solution way int the thread of problem 27.
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phsr
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Re: Paper/Pencil Problems

Post by phsr » Mon Nov 03, 2014 1:05 am

Problem 436 certainly qualifies!

MuthuVeerappanR
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Re: Paper/Pencil Problems

Post by MuthuVeerappanR » Wed Mar 25, 2015 2:49 pm

If you consider using Wolfram Alpha as part of Paper/Pencil, then I would include Problem 444 (View Problem).
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It is not knowledge, but the act of learning, not possession but the act of getting there, which grants the greatest enjoyment.

elishamod
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Re: Paper/Pencil Problems

Post by elishamod » Sat Mar 28, 2015 7:28 am

Problem 286 (View Problem) - Scoring probabilities.
If you don't mind doing lots of lots of non-integer multiplications.
A calculator is actually not accurate enough for this problem, as the answer demands at least 12 significant digits.
So if you don't use a computer, you will have to do it by hand :D
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Mohammad_Ali_B
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Re: Paper/Pencil Problems

Post by Mohammad_Ali_B » Sun May 31, 2015 5:20 am

Problem 52 can be solved without a computer, or even paper and pencil.
I remember just writing in the answer after one of my lectures at Uni.

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nicolas.patrois
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Re: Paper/Pencil Problems

Post by nicolas.patrois » Sun May 31, 2015 12:10 pm

I wrote the answer when I read the problem: I already knew the solution.
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xloxk
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Re: Paper/Pencil Problems

Post by xloxk » Sat Jul 11, 2015 11:14 pm

Problem 106 is possible with pencil and paper. It can be interpreted as a combinatorial problem.

sefi_roee
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Re: Paper/Pencil Problems

Post by sefi_roee » Tue Jul 28, 2015 6:07 pm

Again, If you consider using Wolfram Alpha as part of Paper/Pencil, then I would include Problem 235 (View Problem).

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GenePeer
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Re: Paper/Pencil Problems

Post by GenePeer » Fri Feb 17, 2017 6:48 pm

Problem 209 (View Problem) I'd taken a long hiatus from PE. Good to be back.

stijn263 wrote:
Fri Feb 04, 2011 10:24 am
Problem 208 (View Problem) too :D (although I needed a little help from excel ;))
Fun problem! The paper/pencil solution posted on the solution thread is brilliant. I did however find the group presentation :)
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