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Last edited by vimbloid; 20-May-11 at 2:50 PM.

  • #920
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    Post TestFunda Answers - Higher Maths

    Ans : after 4 Years.
    Sol: sum of their prsent ages= 5x+6x =11x
    Sum of their ages after n year = 15y

    So if we take n = 4, and solve for x ( 5x+4/6x+4 = 7/8), we get x = 2.
    So their present ages are 10 and 12( i.e 5:6) and their future ages are 10+4= 14 and 12+4 = 16 (i.e 7:8)

    Regards,
    Namrta

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    Thread: TestFunda Answers - Higher Maths

    1. #901
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      Post TestFunda Answers - Higher Maths

      Last edited by archana05; 20-May-11 at 1:04 PM.

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      Post TestFunda Answers - Higher Maths

      Paul picks A with the same probability as A’schances of winning
      So probability of picking a winner = prob picking of ghana * ghana winning + prob picking of bolivia * bollivia winning
      = 2/3 * 2/3 + 1/3 * 1/3
      = 5/9

    5. #905
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      Post TestFunda Answers - Higher Maths

      Given n/P = 144
      n= 144*P(steps per minute)
      =144*P*60(steps per hour)
      =144*p*60*1.64(meters per hour) (p=1.64mts)
      =(144*p*60*1.64)/1000 (kmph)
      =14.16 kmph 

    6. #906
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      total probability = probability to select 1st box + probability to select 2nd box

      = (1/2)*(1C1/1C1)+(1/2)*(9C1/19C1)

      = (1/2)*(1+9/19)

      = (1/2)*(28/19)

      = 14/19

    7. #907
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      Post TestFunda Answers - Higher Maths

      These are the suspects. Each person says the one on the right is guilty.
      1 2 3 4 5 6 7 8 9 10
      If all the suspects are lying then 2-10 are not guilty like 1-9 said, they are innocent. If 2-10 are innocent 1 has to be guilty. --- 1 (leftmost) is innocent. They cannot both be true so it is an OR statement. 

      The answer is  A Only

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      Answer is Thursday as on thursday Dwarf tells the truth that he lied yesterday
      Also on thursday Byte lies that yesterday he tells lies where infact on wednesday byte tells truth
      So answer is thursday 

    9. #909
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      Assuming you need to get the answer to the last question (as per how options are given)
      Worst case scenario is she picks up the gloves of a type with the largest count first...
      Then, she would pick up 32 red (even) first , then 25 yellow + 1 blue ( to make it even) and finally 2 blue
      So, minimum gloves that need to picked = 32 + 25+1 + 2 = 60

    10. #910
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      Post TestFunda Answers - Higher Maths


      The big cube is completely hollow.. But, the thickness of
      its side is 1cm & this is made up of smaller cubes.

      Just like the walls of a room. The room is hollow, but, its
      thickness is due to smaller bricks. The 4 walls of this room
      is painted from the outside. And, you are asked totally how
      many sides of all the bricks are now unpainted.

      First, you need to know how many bricks (small cubes) are there.

      Size of big cube = 5cm
      Total volume of the big cube = 5*5*5 = 125cm^3

      Size of the hollow cube inside the big cube = 3cm
      Volume of the hollow space inside the big cube = 3*3*3 = 27cm^3

      Therefore, volume occupied by small cubes (or volume of
      thickness) = 125 - 27 = 98cm^3

      Size of each small cube = 1cm
      Volume of each small cube = 1*1*1 = 1cm^3
      Total number of small cubes in wall = 98 / 1 = 98

      In short, 98 small cubes make up the wall of the big cube.
      Each cube has 6 faces, so 98 cubes have = 98*6 faces = 588

      The four sides of the big cube have 100 painted faces.
      Because each big side has 25 faces of the small cubes.

      Therefore, total unpainted faces = 588 - 100 = 488


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      Post TestFunda Answers - Higher Maths

      Answer is 6
      Take coins 50% greater than the previous one and we get 6 coins till 512 

    12. #912
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      Post TestFunda Answers - Higher Maths

      For such sums,
      just count the points and that is ur answer
      Answer = 9 (place the points on a circle and draw lines..it is for you to see)

    13. #913
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      Post TestFunda Answers - Higher Maths

      now consider the other case, 9 red balls are transferred to green ball box. now total balls in that box will be 19.

      total probability = probability to select 1st box + probability to select 2nd box

      = (1/2)*(1C1/1C1)+(1/2)*(9C1/19C1)

      = (1/2)*(1+9/19)

      = (1/2)*(28/19)

      = 14/19
      So answer is 14/19

    14. #914
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      Post TestFunda Answers - Higher Maths


      Speed of Ferrari = 46 * 4 = 184 kph


      Distance = 953 km


      Time = (953)/(184) = 5.18 hrs


      Ans 5.18 hrs



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      Consider you have two envelopes and two covers. If one of them is placed wrong then it is certain that the other envelope is also placed in the wrong envelope. When the number of envelopes are odd. Then this situation may be possible. If they are even then such a situation is impossible. At least two letters must be placed wrong.
      Hence, option a 

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      Post TestFunda Answers - Higher Maths

      12 programmers take 12 mins to write 12 line of code
      thus 1 programmer takes 12mins to write 1 line of code
      thus 72 programmer will take 12mins to write 72 line of code in total

    17. #917
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      Post TestFunda Answers - Higher Maths

      for a number to be divisible by 4 last 2 digits must be divisible by 4
      we have 1,2,3,4,5 with us
      thus the valid combiantion for last two digit are 12,24,32,44,52 thus the last two places can be filled in 5 ways
      reamining two places can be filled in 5*5 ways
      thus total number of ways are
      25*5=125

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      Post TestFunda Answers - Higher Maths

      Cannot be solved as we are not aware of value of x and it is needed for solving.

      Hence cannot be determined 

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