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. 17.995 x 16.005 +15.999 x 15.001 = ?
    1. 513
    2. 528
    3. 440
    4. 818

  1. View Hint View Answer Discuss in Forum

    ? = 17.995 x 16.005 + 15.999 x 15.001
    = 18 x 16 + 16 x 15 = 16 x (18 + 15)

    Correct Option: B

    ? = 17.995 x 16.005 + 15.999 x 15.001
    = 18 x 16 + 16 x 15 = 16 x ( 18 + 15)
    = 16 x 33 = 528


  1. 127.007 x 7.998 + 6.05 x 4.001 = ?
    1. 1090
    2. 1200
    3. 1120
    4. 1040

  1. View Hint View Answer Discuss in Forum

    ? = 127.007 x 7.998 + 6.05 x 4.001
    = 127 x 8 + 6 x 4

    Correct Option: D

    ? = 127.007 x 7.998 + 6.05 x 4.001
    = 127 x 8 + 6 x 4 = 1016 + 24 = 1040



  1. 198.995 x 12.005 + 16.25 x 6.95 = ?
    1. 2580
    2. 2550
    3. 2400
    4. 2500

  1. View Hint View Answer Discuss in Forum

    ? = 198.995 x 12.005 + 16.24 x 6.95
    = 199 x 12 +16 x 7

    Correct Option: D

    ? = 198.995 x 12.005 + 16.24 x 6.95
    = 199 x 12 +16 x 7 = 2388 + 112 = 2500


  1. 2375.85 ÷ 18.01 - 4.525 x 8.05 ?
    1. 103
    2. 96
    3. 88
    4. 90

  1. View Hint View Answer Discuss in Forum

    ? = 2375.85 ÷ 18.01 - 4.525 x 8.05
    = 2376 ÷ 18 - 4.5 x 8

    Correct Option: B

    ? = 2375.85 ÷ 18.01 - 4.525 x 8.05
    = 2376 ÷ 18 - 4.5 x 8 = 132 - 36 = 96



  1. 2508 ÷ 15.02 + ? x 11 = 200
    1. 13
    2. 8
    3. 3
    4. 4

  1. View Hint View Answer Discuss in Forum

    2508 ÷ 15.02 ÷ ? x 11 = 200
    ⇒ 2508/15 + ? x 11 = 200

    Correct Option: C

    2508 ÷ 15.02 ÷ ? x 11 = 200
    ⇒ 2508/15 + ? x 11 = 200
    ∴ ? = (200 - 167.2) x 1/11 = 2.98 ≈ 3