Approximation


Direction: What approximate value should come in place of the question mark(?) in the following question ? (Note that you are not expected to calculate the exact value).

  1. 6888.009 - 487.999 - 87.989 =?









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    ? = 6888.009 - 487.999 - 87.989
    ∴ ? ≈ 6888 - 488 - 88

    Correct Option: D

    ? = 6888.009 - 487.999 - 87.989
    ∴ ? ≈ 6888 - 488 - 88
    ⇒ ? ≈ 6888 - 576 ⇒ ? ≈ 6312 ≈ 6310


  1. (9.2)2 = ?









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    ? = (9.5)2 = 90.25

    Correct Option: B

    ? = (9.5)2 = 90.25 ≈ 90



  1. 12.49% of 839.859 = ?









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    ?= 12.49% of 839.859 ≈ 12% of 840

    Correct Option: B

    ?= 12.49% of 839.859 ≈ 12% of 840
    = 840 x 12/100 = 100.80 ≈ 100


  1. 124.35 % 8096 = ?









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    ? = 124.35% of 8096
    = (8096 x 124.35)/100 = 1006737.6/100

    Correct Option: B

    ? = 124.35% of 8096
    = (8096 x 124.35)/100 = 1006737.6/100
    = 10067.376 = 10000



  1. 121% of 5103 = ?









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    ? = 5103 x 121/100
    = 61.74.63

    Correct Option: A

    ? = 5103 x 121/100
    = 61.74.63 = 6000