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Mathematics Mains paper discussion and solutions - 2018

IMS has posted solutions of paper 1 and 2 on website : http://ims4mathselearning.com/files/UPSC-MATHEMATICS-OPTIONAL-PAPER-2-SOLUTION-2018.pdf
http://ims4mathselearning.com/files/UPSC-MATHEMATICS-OPTIONAL-SOLUTION-1-2018.pdf

we can have a discussion on correct attempts, expected scaling etc just to get a benchmarking idea
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Comments

  • Hello...how much u r getting ..I am getting 240 correct in paper one and 130 correct in paper 2
  • Kira_0705 said:

    IMS has posted solutions of paper 1 and 2 on website : http://ims4mathselearning.com/files/UPSC-MATHEMATICS-OPTIONAL-PAPER-2-SOLUTION-2018.pdf
    http://ims4mathselearning.com/files/UPSC-MATHEMATICS-OPTIONAL-SOLUTION-1-2018.pdf

    we can have a discussion on correct attempts, expected scaling etc just to get a benchmarking idea

    How much are you getting ? My correct attempt is 210 +180..
  • almost same , Mine is 220+190 did you guys find question which might have been solved wrong by IMS solutions ?
  • karna123 said:

    Hello...how much u r getting ..I am getting 240 correct in paper one and 130 correct in paper 2

    you have 100% almost in paper 1 that is great accuracy man
  • Kira_0705 said:

    almost same , Mine is 220+190 did you guys find question which might have been solved wrong by IMS solutions ?

    Kaunsa galat lag Raha hai ?I have simply checked final answer and have given zero if incorrect
  • Number of basic solutions wala I was getting 3 he has taken one negative solution as not feasible I think it is not feasible yes but still a basic solution baki toh sahi lag rahe hain sare
  • Kira_0705 said:

    Number of basic solutions wala I was getting 3 he has taken one negative solution as not feasible I think it is not feasible yes but still a basic solution baki toh sahi lag rahe hain sare

    Negative one does not come in basic solution..
  • Kira_0705 said:

    karna123 said:

    Hello...how much u r getting ..I am getting 240 correct in paper one and 130 correct in paper 2

    you have 100% almost in paper 1 that is great accuracy man
    Paper 1 ...went good...made mistakes worth 30-40 marks in paper 2..
    Like in Simpson did not take t=0 v=0
  • Kira_0705 said:

    Number of basic solutions wala I was getting 3 he has taken one negative solution as not feasible I think it is not feasible yes but still a basic solution baki toh sahi lag rahe hain sare

    Bhai I wrote three and then wrote that bfs are 2. Simpson main I forgot to convert minutes to HR. Hence getting incorrect answer Kuch marks mil sakte hain kya ya phir seedhe zero milega ?
  • trumpIAS said:

    Kira_0705 said:

    Number of basic solutions wala I was getting 3 he has taken one negative solution as not feasible I think it is not feasible yes but still a basic solution baki toh sahi lag rahe hain sare

    Bhai I wrote three and then wrote that bfs are 2. Simpson main I forgot to convert minutes to HR. Hence getting incorrect answer Kuch marks mil sakte hain kya ya phir seedhe zero milega ?
    yes exactly Basic solutions are 3 and basic feasible are two I have written same .

    I dont think 0 milega atleast formula and correct implementation of formula ka toh milna chaiye
  • Kira_0705 said:

    trumpIAS said:

    Kira_0705 said:

    Number of basic solutions wala I was getting 3 he has taken one negative solution as not feasible I think it is not feasible yes but still a basic solution baki toh sahi lag rahe hain sare

    Bhai I wrote three and then wrote that bfs are 2. Simpson main I forgot to convert minutes to HR. Hence getting incorrect answer Kuch marks mil sakte hain kya ya phir seedhe zero milega ?
    yes exactly Basic solutions are 3 and basic feasible are two I have written same .

    I dont think 0 milega atleast formula and correct implementation of formula ka toh milna chaiye
    Ok thanks..
  • karna123 said:

    Kira_0705 said:

    karna123 said:

    Hello...how much u r getting ..I am getting 240 correct in paper one and 130 correct in paper 2

    you have 100% almost in paper 1 that is great accuracy man
    Paper 1 ...went good...made mistakes worth 30-40 marks in paper 2..
    Like in Simpson did not take t=0 v=0
    @karna123 was this your first attempt? what do you think about toughness and scaling?
  • Kira_0705 said:

    karna123 said:

    Kira_0705 said:

    karna123 said:

    Hello...how much u r getting ..I am getting 240 correct in paper one and 130 correct in paper 2

    you have 100% almost in paper 1 that is great accuracy man
    Paper 1 ...went good...made mistakes worth 30-40 marks in paper 2..
    Like in Simpson did not take t=0 v=0
    @karna123 was this your first attempt? what do you think about toughness and scaling?
    This is my first mains with maths..I found paper easy...but don't know about marking...how much I can expect on my attempt?
  • Kira_0705 said:

    almost same , Mine is 220+190 did you guys find question which might have been solved wrong by IMS solutions ?

    I think in 5(a) paper 2 first degree pde will be formed and in 3(c) they missed one solution .

  • 1539159499440-1264950032.jpg
    2340 x 4160 - 2M
  • karna123 said:

    Kira_0705 said:

    karna123 said:

    Kira_0705 said:

    karna123 said:

    Hello...how much u r getting ..I am getting 240 correct in paper one and 130 correct in paper 2

    you have 100% almost in paper 1 that is great accuracy man
    Paper 1 ...went good...made mistakes worth 30-40 marks in paper 2..
    Like in Simpson did not take t=0 v=0
    @karna123 was this your first attempt? what do you think about toughness and scaling?
    This is my first mains with maths..I found paper easy...but don't know about marking...how much I can expect on my attempt?
    dont know mate same first attempt maybe some senior could help us
  • karna123 said:

    Kira_0705 said:

    Number of basic solutions wala I was getting 3 he has taken one negative solution as not feasible I think it is not feasible yes but still a basic solution baki toh sahi lag rahe hain sare

    Negative one does not come in basic solution..
    Bhai Negative is a basic solution but it is not a basic feasible solution
  • Do you think in 1(e) question asked about finding the solution as well or just asked to pose a linear programming problem
  • Usopp said:


    I think your solution is correct damn I have made it second degree
  • Usopp said:

    Do you think in 1(e) question asked about finding the solution as well or just asked to pose a linear programming problem

    Just pose the equation.. what is your attempt in both papers ?
  • trumpIAS said:

    Usopp said:

    Do you think in 1(e) question asked about finding the solution as well or just asked to pose a linear programming problem

    Just pose the equation.. what is your attempt in both papers ?
    was it? I solved it but was getting wrong answer , will I get some marks for writing correct equation atleast?
  • Getting 225 and 200 keeping above two correct
  • In langragian Wala question I did not solved 2 equation I got . How much do you think they will give. I am considering 10 for it.
  • Looks like attempts have increased thi
    Usopp said:

    In langragian Wala question I did not solved 2 equation I got . How much do you think they will give. I am considering 10 for it.

    yes be on safe count 10 for now but I think you should get full if you have written and identified the system

    I think there would be huge scaling many in 380's-420's range
  • Kira_0705 said:

    Looks like attempts have increased thi

    Usopp said:

    In langragian Wala question I did not solved 2 equation I got . How much do you think they will give. I am considering 10 for it.

    yes be on safe count 10 for now but I think you should get full if you have written and identified the system

    I think there would be huge scaling many in 380's-420's range
    No i just wrote 2 equation which came after solving langragian equation for x and y. Damn I didn't even identified the system .

    I guess however tougher 420+ will be above 320
  • Usopp said:

    In langragian Wala question I did not solved 2 equation I got . How much do you think they will give. I am considering 10 for it.

    Haha..I did same as well.. assuming 10 only...
  • Usopp said:

    Kira_0705 said:

    Looks like attempts have increased thi

    Usopp said:

    In langragian Wala question I did not solved 2 equation I got . How much do you think they will give. I am considering 10 for it.

    yes be on safe count 10 for now but I think you should get full if you have written and identified the system

    I think there would be huge scaling many in 380's-420's range
    No i just wrote 2 equation which came after solving langragian equation for x and y. Damn I didn't even identified the system .

    I guess however tougher 420+ will be above 320
    that is good enough I guess
  • Ims wale 460 correct attempt highest Bata rhe h kisi ke
  • 460 correct attempt is decent enough last time 440 sun rahe the I was fearing koi 500/500 na kr le
  • In paper 1 - 1c i have founded the limit equal to 2/pi and then have wrote that since limit is finite therefore it exists . But IMS solution is different in approach.

    Similarly , in paper 2 - 5e i have written the formula in algorithm as mod(x0-x1)<10^-5 . But sir has given that mod(x0-x1/x)< e . I think sir has approached it wrong .
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