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DRDO MTS 2020 Aptitude Test - 30
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DRDO MTS 2020 Aptitude Test - 30

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  • Question 1/10
    1 / -0

    A builder borrows ₹2550 to be paid back with compound interest at the rate of 4% per annum by the end of 2 years in two equal installments. How much will each installment be?

    Solutions

    Let each installment be ₹x

     

  • Question 2/10
    1 / -0

    Solutions

     

  • Question 3/10
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    The average of 44 consecutive odd numbers is 144.What is the largest number?

    Solutions

    Let the numbers be (a, a+2, ………………. , a+86)

    Avg of 44 numbers = 144

    Largest number = 101+86 = 187

     

  • Question 4/10
    1 / -0

    If A, B and C together do a job in 4 days, A and C together do the job in 4.5 days and B and C together do the job in 12 days then in how many days can C alone do the job?

    Solutions

    Let the total work be 36 units. 

    => (A+B+C) can do 9 units/day ................(i)

    (A+C) can do 8 units/day ....................(ii) and

    (B+C) can do 3 units/day .............(iii) 

    From (i), (ii) and (iii) , 

    we get B do 1 unit/day and C do 2 units/day. 

    So, C alone will do the work in time = (36/2)=18 days.

     

  • Question 5/10
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    If [√(a2 + b2 + ab)] + [√(a2 + b2 – ab)] = 1, then what is the value of (1 – a2)(1 – b2)?

    Solutions

     

  • Question 6/10
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    What is the value of [cos (90 + A)÷sec (270 – A)] + [sin (270 + A)÷cosec (630 – A)]? 

    Solutions

     

  • Question 7/10
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    Directions For Questions

    Directions: The histogram given below shows the number of families of a locality having various incomes as obtained by a survey. Observe the graph and answer the questions based on it. 

    ...view full instructions

    How many families have been surveyed in total?

    Solutions

    Number of families = 15 + 10 + 40 + 5 + 20 + 30 + 15 + 10 + 40 + 15 

    = 200

     

  • Question 8/10
    1 / -0

    Directions For Questions

    Directions: The histogram given below shows the number of families of a locality having various incomes as obtained by a survey. Observe the graph and answer the questions based on it. 

    ...view full instructions

    The number of families, whose daily incomes are Rs. 800 or above is:

    Solutions

    Number of families (income ≥ 800)

    = 40 + 15+10 = 65

     

  • Question 9/10
    1 / -0

    Directions For Questions

    Directions: The histogram given below shows the number of families of a locality having various incomes as obtained by a survey. Observe the graph and answer the questions based on it. 

    ...view full instructions

    The number of families, whose daily incomes are below Rs. 200, is

    Solutions

    Number of families (income < 200) =  15

     

  • Question 10/10
    1 / -0

    Directions For Questions

    Directions: The histogram given below shows the number of families of a locality having various incomes as obtained by a survey. Observe the graph and answer the questions based on it. 

    ...view full instructions

    The number of families, whose daily incomes are between Rs 500 and Rs 800 is:

    Solutions

    Number of families  = (30 + 15 ) = 45

     

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