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Thread: for those who know math well.

  1. #1
    U19 Vice-Captain Behlol's Avatar
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    Icon1 for those who know math well.

    how do u find the square root of a number?
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  2. #2
    International Captain Buddhmaster's Avatar
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    Use your calculator.

  3. #3
    International Captain Swervy's Avatar
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    Quote Originally Posted by Buddhmaster
    Use your calculator.
    thats the best answer you will get
    rave down, hit the ground


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  4. #4
    International Coach biased indian's Avatar
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    Quote Originally Posted by Buddhmaster
    Use your calculator.
    Finding square roots of of numbers that aren't perfect squares without a calculator

    1. Estimate - first, get as close as you can by finding two perfect square roots your number is between.

    2. Divide - divide your number by one of those square roots.

    3. Average - take the average of the result of step 2 and the root.

    4. Use the result of step 3 to repeat steps 2 and 3 until you have a number that is accurate enough for you.


    Example: Calculate the square root of 10 to 2 decimal places.

    1. Find the two perfect square numbers it lies between.


    Solution:
    (3)2 = 9 and (4)2 = 16, so lies between 3 and 4.

    2. Divide 10 by 3. 10/3 = 3.33 (you can round off your answer)

    3. Average 3.33 and 3. (3.33 + 3)/2 = 3.1667

    Repeat step 2: 10/3.1667 = 3.1579
    Repeat step 3: Average 3.1579 and 3.1667. (3.1579 + 3.1667)/2 = 3.1623

    Try the answer --> Is 3.1623 squared equal to 10? 3.1623 x 3.1623 = 10.0001

    If this is accurate enough for you, you can stop! Otherwise, you can repeat steps 2 and 3.

    Note: There are a number of ways to calculate square roots without a calculator. This is only one of them.
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  5. #5
    International Captain Swervy's Avatar
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    Quote Originally Posted by biased indian
    Finding square roots of of numbers that aren't perfect squares without a calculator

    1. Estimate - first, get as close as you can by finding two perfect square roots your number is between.

    2. Divide - divide your number by one of those square roots.

    3. Average - take the average of the result of step 2 and the root.

    4. Use the result of step 3 to repeat steps 2 and 3 until you have a number that is accurate enough for you.


    Example: Calculate the square root of 10 to 2 decimal places.

    1. Find the two perfect square numbers it lies between.


    Solution:
    (3)2 = 9 and (4)2 = 16, so lies between 3 and 4.

    2. Divide 10 by 3. 10/3 = 3.33 (you can round off your answer)

    3. Average 3.33 and 3. (3.33 + 3)/2 = 3.1667

    Repeat step 2: 10/3.1667 = 3.1579
    Repeat step 3: Average 3.1579 and 3.1667. (3.1579 + 3.1667)/2 = 3.1623

    Try the answer --> Is 3.1623 squared equal to 10? 3.1623 x 3.1623 = 10.0001

    If this is accurate enough for you, you can stop! Otherwise, you can repeat steps 2 and 3.

    Note: There are a number of ways to calculate square roots without a calculator. This is only one of them.
    I beleive that process is called 'iteration'

  6. #6
    U19 Vice-Captain Behlol's Avatar
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    thanks biased indian,u r very helpful.

  7. #7
    Cricketer Of The Year Robertinho's Avatar
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    Haha mang, you could have just used the square root button on your calculator
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  8. #8
    Hall of Fame Member age_master's Avatar
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    Quote Originally Posted by Buddhmaster
    Use your calculator.

    unless you do 4 unit (highest school maths) out here thats what we have been taught
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