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Thread: TestFunda Answers - Modern Maths

  1. #541
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    Post TestFunda Answers - Modern Maths

    . If a pipe can fill the tank within 6hrs.But due to leak it takes 30 min more.Now the tank is full then how much time will it take to empty the tank throught the leak.?
    Options
    1) 
    59
    2) 
    56
    3) 
    66
    4) 
    78
    Additional Notes: Plz explain me clearly ..

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    Post TestFunda Answers - Modern Maths

    from the data we get
    1/6 - 1/x = 1/6.5
    wer x is the time taken for a filled tank to be empty
    so x = 78 

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    Post TestFunda Answers - Modern Maths

    1st profit = 20 - 15 = 5
    2nd profit = 40 - 30 = 10
    total 15 

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    Post TestFunda Answers - Modern Maths

    first 32 red
    then 24 black
    then 1 black 1 blue
    last 2 blue
    After taking out all this 2 pairs of every colour we get 

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    Post TestFunda Answers - Modern Maths


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    Post TestFunda Answers - Modern Maths


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    Last edited by vimbloid; 01-Dec-10 at 11:30 PM.

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    Post TestFunda Answers - Modern Maths

    6 persons standing in queue with different age group, after two years their average age will be 43 and seventh person joined with them. Hence the current average age has become 45. Find the age of seventh person?

    Options
    1) 
    31
    2) 
    43
    3) 
    52
    4) 
    69

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    Post TestFunda Answers - Modern Maths

    In a market 4 men are standing. The average age of the four before 4years is 45, after some days one man is added and his age is 49. What is the average age of all?
    Options
    1) 
    43
    2) 
    45
    3) 
    47
    4) 
    49

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    Post TestFunda Answers - Modern Maths

    In the reading room of a library, there are 10 tables, 4 chairs per table. In each table there are different numbers of people seated. How many ways they will sit in the library so that no chair would be blank?
    Options
    1) 
    2
    2) 
    6
    3) 
    7
    4) 
    8

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    Post TestFunda Answers - Modern Maths

    A lady builds 9cm length, 10cm width,3cm height box using 1 cubic cm cubes. What is the minimum number of cubes required to build the box?
    Options
    1) 
    270
    2) 
    310
    3) 
    720
    4) 
    730

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    Post TestFunda Answers - Modern Maths

    Out of 7 children the youngest is boy then find the probability that all the remaining children are boys?
    Options
    1) 
    1/64
    2) 
    1/32
    3) 
    1/128
    4) 
    1/256

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    Post TestFunda Answers - Modern Maths

    A Person buys a horse for 15 ponds, after one year he sells it for 20 pounds. After one year, again he buys the same horse at 30 pounds and sells it for 40 pounds. What is the profit for that person?
    Additional Notes: plz don't give direct answers

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    Post TestFunda Answers - Modern Maths

    John buys a cycle for 31 dollars and given a cheque of amount 35 dollars. Shop Keeper exchanged the cheque with his neighbor and gave change to John. After 2 days, it is known that cheque is bounced. Shop keeper paid the amount to his neighbor. The cost price of cycle is 19 dollars. What is the profit/loss for shop keeper?
    a)loss 23 b)gain 23 c)gain 54 d)Loss 54     
    Additional Notes: plz don't give me direct answers

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    Post TestFunda Answers - Modern Maths

    The age of the two friends were in the ration of 6:5.If the sum of their ages is 55.Then after how many years their ratio will become 8:7?
    Options
    1) 
    7
    2) 
    10
    3) 
    11
    4) 
    12

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    Post TestFunda Answers - Modern Maths

    69, option 4
    Current average age is 41 (total 246)
    When 7 the person joins average age becomes 45 (total 305)
    age of 7th person, 305 - 246 = 69 

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    Post TestFunda Answers - Modern Maths

    49 only.
    Current average age is 49 and person coming in the group is of age 49

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    Post TestFunda Answers - Modern Maths


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    Post TestFunda Answers - Modern Maths

    1/64 (option 1)
    child can be boy with probability of 1/2 (assumption)
    so, probability of all 6 children to be boys is (1/2)6

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