Find the square root of 400 by division method.

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answer is A.

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Detailed Solution

Concept: Make pairs from the unit place to start your search for the square root of the provided integer. The largest number that has a square that is equal to or just below the value in the first bar from the left should now be chosen. Subtract the square of the number written in the quotient from the digit of the provided number. Bring the next pair down. Next, multiply the original number by two and add the unit digit so that the result is less than the current dividend when the original number and the new number are multiplied together. Continue until the remainder is equal to 0.
As

Therefore, our divisor is 2 . Subtract the first pair from the square of 2 and then bring the next pair down.
Now, we get,
Next, our dividend is 0 .
Twice of the first divisor is

We will now locate the unit digit that should be combined with 2 so that the result of multiplying it by the new number is less than or equal to the dividend.
Therefore, we have

As a result, the divisor's next digit is 0.
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