Discussion Zone – 22 December 2016

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184 Thoughts to “Discussion Zone – 22 December 2016”

  1. Suraj

    2. In an examination a student who gets 20% of the maximum marks fails by 5 marks. Another student who scores 30% of the maximum marks gets 20 marks more than the pass marks. The necessary percentage required for passing is
    A) 32%
    B) 23%
    C) 22%
    D) 20%

  2. Suraj

    A contactor undertakes to make a road in 40 days and employs 25 men. After 24 days, he finds that only one-third of the road is made. How many extra men should he employ so that he is able to complete the work 4 days earlier?
    A) 100
    B) 60
    C) 75
    D) 55

  3. Suraj

    A retailer buys 40 pens at the marked price of 36 pens. If he sells these pens giving a discount of 1%, what is the profit percent?
    A. 9%
    B. 10%
    C. 11%
    D. 12%

      1. kumkum ahuja

        solution bhi dena sath me mera maths week h

        1. GRAVITAS~HANKER~NITROUS OXIDE

          O-O

    1. Suraj

      B. 10%
      Explanation:
      Let MP of 1 pen = Re 1
      CP of 40 pens = MP of 36 pens = Rs 36
      MP of 40 pens = Rs 40
      So after discount of 1%, SP of 40 pens = 99/100 * 40 = Rs 39.6
      So profit% = (39.6 – 36) / 36 * 100 = 10%

    2. ambika

      cp=36 sp = 39.6
      p% = 3.6/26*100=10%

  4. Suraj

    8. A can cultivate 2/5th of the land in 6 days and B can cultivate 1/3rd of the same land in 10 days. Working together A and B can cultivate 4/5th of the land in how many days?
    A) 4 days
    B) 5 days
    C) 8 days
    D) 10 days

    1. ambika

      ddd
      15*30/45=10 days

    2. Suraj

      C) 8 days
      Explanation:
      A can cultivate 2/5th of the land in 6 days, so whole land in 5/2 * 6 = 15 days.
      B can cultivate 1/3th of the land in 10 days, so whole land in 3/1 * 10 = 30 days.
      A and B together can complete whole land in 15*30/(15+30) = 10 days.
      So 4/5th land in 4/5 * 10 = 8 days

  5. Suraj

    A does half as much work as B in one sixth of the time. If together they take 10 days to complete a work, how many days shall B take to do it alone?
    A) 70
    B) 30
    C) 40
    D) 50

    1. Suraj

      C) 40
      Explanation:
      Let B do whole work in ‘x’ days.
      A does ½ work in x/6 days, so whole work in 2x/6 = x/3 days
      Together they take 10 days, so x * x/3 / (x+x/3) = 10
      Solve, x = 40 days

  6. Suraj

    Oranges are bought at 7 for Rs 3. At what rate per hundred must they be sold to gain 33%?
    A) Rs 56
    B) Rs 57
    C) Rs 58
    D) Rs 60

    1. Suraj

      B) Rs 57

      7 for Rs 3, so for 1 Re oranges are 7/3
      So for Re 1 to gain 33%, number of oranges sold = 7/3 * 100/(100+33) = 100/57
      So per hundred oranges = 57 Rs

    2. ambika

      100*3*133/7*100=57

  7. Suraj

    10. The selling price of an article is marked at 20% above the cost price. At the time of selling, he allows a discount of 8%. His profit percent is:
    A. 20%
    B. 10.4%
    C. 8.6%
    D. 12%

    1. Suraj

      B. 10.4%
      Explanation:
      Use M.P. = (100 + p%)/(100 – d%) * C.P.
      MP is 20% above CP.
      120/100 C.P. = (100 + p%)/(100 – 8) * C.P.

      solveing we get
      p = 10.4%

    2. ambika

      100*6/5*92/100=110.4

  8. Suraj

    The ratio of income of A and B is 2:3. The sum of their expenditure is Rs.8000 and the amount of savings of A is equal to the amount of expenditure of B.What is the their ratio of sum of income to their sum of savings?
    A.5:3
    B.3:2
    C.4:3
    D.3:1
    E.None of these

    1. ambika

      sol??? mujhe to nhi ata ye

    2. Suraj

      Answer A.5:3
      Explanation :
      2I-E + E = 8000
      I = 4000
      Sum of their Income = 5*I = 5*4000 = 20,000
      Sum of their Savings = 20000-8000 = 12,000
      20000:12000 = 5:3

      1. Purvi

        2I-E + E = 8000
        line samaj nhi aayi

        1. ambika

          2i = sum of income
          sum of saving of one is = sum of expenditure of other so 2e taken

    3. GRAVITAS~HANKER~NITROUS OXIDE

      2…………………………………….3.
      X…………………………………….Y……….8000
      Y……………………………………..Z
      2X-Y====-8000-Y
      X===4000

  9. Suraj

    There are two numbers. When 25% of the first number is added to the second number, the resultant number is 1.5times th first number.What is the ratio of 1st number to the 2nd number ?
    A.3:5
    B.5:4
    C.4:5
    D.2:3
    E.None of these

    1. Suraj

      Answer – C.4:5
      Explanation :
      A+25/100 + B = 1.5A
      A/4 + B = 15A/10
      10A+40B/40 =60A/40
      10A+40B = 60A
      50A = 40B
      A/B = 4/5

  10. Suraj

    An HR Company employs 4800 persons, out of which 45 percent are males and 60 percent of the males are either 25 years or older. How many males are employed in that HR Company who are younger than 25 years?
    1) 2640
    2) 2160
    3) 1296
    4) 864

  11. Suraj

    7x^2 – 43x + 60 = 0;
    2y^2 – 17y + 36 = 0

    A. x ≤ y
    B. x ≥ y
    C. x > y
    D. No relationship

      1. ambika

        galt ho gya :((

      2. Purvi

        x = 15/7 , 4
        y = 9/2 , 4
        aa rha hai na

        1. ambika

          hmm mene 7 ko 2 le liya tha so wrong ho gya mera

    1. " Born To Win "

      kuch dikh nhi rha mujhe ???

    2. Suraj

      A. x ≤ y

      Explanation:
      7×2 – 43x + 60 = 0
      7×2 – 28x – 15x + 60 =0
      7(x-4) – 15(x-4) = 0
      x = 4, 15/7
      2y2 – 17y + 36 = 0
      2y2 – 8y – 9y + 36 = 0
      2(y-4) – 9(y-4) = 0
      y = 4, 9/2

  12. Suraj

    In an examination, 30% of the total students failed in Hindi, 45% failed in English and 20% failed in both the subjects. Find the percentage of those who passed in both the subjects.
    1) 35.7%
    2) 35%
    3) 40%
    4) 45%

    1. Purvi

      kese sol karete yese ques
      plz tips do

      1. ambika

        mujhe bhi ni ata ye but ese shayd 45+20+30-40=55
        100-55=45%

      2. Suraj

        failed in both= 20%
        means fail in only hindi=30-20=10%
        fail in only eng =45-20=25%
        means fail in atleast 1 subject =20+10+25=55%
        remaining students are passed in both subject=100-55=45%

      3. ^^^Jaga^^^....

        100-(x+y-z)

    1. ambika

      total……………………………..60
      a………………………………..2
      b……………………………..3
      c……………………………….6
      in 3 min. a……………….6
      b………………………..9
      c……………………….18
      so r=18/33=6/11

      1. ^^^Jaga^^^....

        wahh…

        1. ambika

          :)) dekha mujhe thoda boht maths ata hai :))

          1. ^^^Jaga^^^....

            tum cutoff badhati ho bas 😛

  13. Suraj

    If 12 men and 16 boys can do a piece of work in 5 days; 13 men and 24 boys can do it in 4 days, then the ratio of the daily work done by a man to that of a boy is
    A. 1 : 2
    B. 2 : 1
    C. 3 : 2
    D. 5 : 4

      1. Suraj

        provide the sol.

    1. Purvi

      (12m+16b)*5 = (13m+24b)*4
      m = 2b

      1. ^^^Jaga^^^....

        solution??

        1. Purvi

          2/7 9/16
          1/2
          7 8

  14. Suraj

    8. A car owner buys petrol at Rs 4, Rs 5 and Rs 6 per litre for three successive years. What approximately is the average cost per litre of petrol if he spends Rs 2400 each year?
    A. Rs 4.86
    B. Rs 4
    C. Rs 5
    D. Rs 6

    1. ambika

      ye kaise hoga ??????

    2. Suraj

      avg cost = total amount spend on petrol/ total quantity of petrol
      petrol quantity in year 1=2400/4=600 L
      Q2=2400/5=480L
      Q3=2400/6=400L
      avg cost=3*2400/(600+480+400)=4.86

    3. " Born To Win "

      720/148

  15. Suraj

    A boat can travel with a speed of 13 km/hr in still water. If the speed of the stream is 4 km/hr, find the time taken by the boat to go 68 km downstream.
    A. 2 hours
    B. 4 hours
    C. 3 hours
    D. 5 hours

    1. ^^^Jaga^^^....

      bbbbbbbbbbbb

  16. Suraj

    A shopkeeper sells an item at 20% profit but uses a weight of 1200 gm instead of 1 kg. Find hid net profit/loss %.
    A. 15%
    B. 12.5%
    C. 10%
    D. 0%

        1. ambika

          sp=120%
          cp=120%
          profit=0

    1. GRAVITAS~HANKER~NITROUS OXIDE

      NO PROFIT NO LOSS

  17. Suraj

    By selling an item at 7/10th of the actual selling price, a trader makes a profit of 20%. If he sells the product at 20% less than the actual selling price, then what will be the profit or loss %?
    A. 30%
    B. 20%
    C. 37 1/7%
    D. 33 1/3%

    1. GRAVITAS~HANKER~NITROUS OXIDE

      700…………….840
      700…………….1200 ORIGNAL
      960-700====260/7
      37//7 ANS

  18. Suraj

    Focus more on that questions which you are unable to solve in one attempt.

  19. Suraj

    #Error-Detection

  20. Suraj

    He is serving (A) / under me for (B) / the last several years but (C) / I cannot claim even today that I have understood him thoroughly.(D) / No error(E)

    1. Suraj

      A) he has been serving….
      several years se kaam raha hai abhi tak …isliye has been.. present continous

  21. Suraj

    She never (A) / minds the children (B) / to play (C) / in the garden. (D) / No error(E)

    1. Suraj

      C) to play=>playing

  22. Suraj

    Do not (A) / get down the bus (B) / till it (C) / will stop. (D) / No error.(E)

    1. ^^^Jaga^^^....

      delete will

      1. ambika

        and change stop to stops

    2. Suraj

      D) will stop=>stops

  23. Suraj

    He insisted (A) / on (B) / to go (C) / there. (D) / No error.(E)

  24. Suraj

    I will not move (A) / from here (B) / until (C) / you will get back.(D) / No error.(E)

    1. ambika

      i ke saath will aa sakta hai for determination??

  25. Suraj

    Thats it for today…
    Utilize this platform to the fullest, by getting ur doubts cleared and solving various questions.
    Unique questions framed by Shubhra Mam will be useful for all exams..
    Gudnyt

    1. ambika

      thankuu good night :))

    2. Purvi

      thanku sir
      gud nt

  26. Purvi

    abhi or koi quiz hogi kya

    1. Suraj

      u can start 😀

      1. Purvi

        health issue
        so i cant

  27. " Born To Win "

    What is the marked price of the article?
    Statement I →The article is sold at 15% discount on market price still making a gain of 16 Rs
    Statement II →The difference between the marked price and selling price is 50% more than the difference between Selling price and cost price.

      1. " Born To Win "

        apka ans ?

        1. Purvi

          mujhe samaj he nhi aara to mera skip

    1. GRAVITAS~HANKER~NITROUS OXIDE

      BOTH

        1. GRAVITAS~HANKER~NITROUS OXIDE

          GE EVE

        1. GRAVITAS~HANKER~NITROUS OXIDE

          ANS KHA HAI WESSE ??

        2. GRAVITAS~HANKER~NITROUS OXIDE

          ?????
          BTA DO KK SRY 🙁

          1. " Born To Win "

            ans nhi pta

    2. GRAVITAS~HANKER~NITROUS OXIDE

      BOTH ??

    3. ^^^Jaga^^^....

      both needed

    4. ^^^Jaga^^^....

      let mp=x
      15% discount on mp
      so sp=x*75/100=3x/4
      cp=3x/4-16

      in stmt II, mp-sp=(sp-cp)+50
      x-3x/4=(3x/4-(3x/4-16))+50
      solve this /
      correct???

      1. " Born To Win "

        solve aap hi krke do

          1. " Born To Win "

            15% hna ?

          2. ^^^Jaga^^^....

            sry sry 136 ans 🙂

          3. " Born To Win "

            aapne 10% kyu liya

          4. ^^^Jaga^^^....

            mai galti se kar diya…but method ye hi hai…

          5. " Born To Win "

            thanx..

          6. " Born To Win "

            15% discount

          7. ^^^Jaga^^^....

            ohoo..hn wese hi hoga…mai 75 ka kar diya

      2. ^^^Jaga^^^....

        method yehi hai..but solution galat hai mera

    5. Suraj

      neither hona chahye

      1. ^^^Jaga^^^....

        sir kese?

        1. Suraj

          statement 1 se suppose
          MP=100x
          SP= 85x
          CP=85x-16
          2nd se

          MP-CP=3/2(SP-CP)
          15x=3/2 16
          find x and get MP
          so both

          1. ^^^Jaga^^^....

            yes sir,,,mera 2nd stmt ka equation galat tha,, sry

            thank u

        2. Suraj

          wait maine ek line miss kr di

          1. ^^^Jaga^^^....

            both hoga????

    1. ^^^Jaga^^^....

      gnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn 🙂

  28. " Born To Win "

    After replacing an old member by a new member, it was found that the average age of four members of a family is the
    same as it was 3 year ago. What is the difference between the ages of the replaced and the new member ?

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