IBA Sukkur Mathematics MCQs STS SIBA Past Papers

The average of 10 numbers is calculated as 15. It is discovered later on that while calculating the average one number namely 36 was wrongly read as 26. The correct average is _____

  • 11
  • 13
  • 16
  • 19
  • c
  • Total Numbers=10
    Incorrect Average=15
    By mistake students read 26 instead of 36
    Sum of All Averages=10*15=150
    Correct Calculation=Incorrect Sum + Correct Sum-Incorrect Number
    Correct Calculation=150+36-26=160
    Correct Average=160/10=16

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IBA Sukkur Mathematics MCQs STS SIBA Past Papers

A boy is cutting a rectangular lawn 40 ft long and 30 ft wide. He has cut all of it except for a rectangle that is 20 ft long and 15 ft wide. The fraction part of the lawn remains uncut _____

  • 1/4
  • 2/5
  • 2/125
  • 3/125
  • a
  • Area of Lawn=40*30=1200ft
    Uncut Part of the Lawn=20*15=300ft
    Fraction Part of the Lawn=300/1200=1/4
    You can write as 1/4 or 25%.

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IBA Sukkur Mathematics MCQs STS SIBA Past Papers

Ahmed spent 2/3 of his saving on a used car and he spent ¼ of his remaining saving on a new carpet. If the carpet costs him Rs.250 then the amount spent by him on the car is:

  • 2000
  • 3000
  • 3500
  • 4000
  • a
  • Total Saving= x
    Spent on Car=2/3(x)
    Remaining Amount=X-2/3(x) =(3x-2X) / 3=X/3
    Carpet= 1/4 of remaining amount
    =1/4*X/3=X/12
    Amount of Carpet=250
    X/3=250
    X=250*12=3000
    Amount spent on Car=2/3(X)
    2/3 (3000)=6000/3000=2000
    The amount spend on car=2000

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IBA Sukkur Mathematics MCQs STS SIBA Past Papers

In Math there are 60 problems which were to be done in 1 hour. A student completes 30 problems in 20 minutes, the average time in seconds for completing each of the remaining problem is:

  • 70
  • 80
  • 90
  • 98
  • b
  • Total Problems=60
    A Student completes 30 Problems in 20 minutes
    Remaining Problems=60-30=30
    Ramingining Time=60-20=40
    30 Problems solved=40 minutes
    01 Problem solved=40/30*60=80 Seconds

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