# While finding root of a square number why we take pairs of number from right, but not left?

Please see below.

The reason is that square root depends critically on such pairs . You can find the some of the details at this answer.

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When finding the square root of a square number, we take pairs of numbers from right to left because each pair corresponds to a part of the square. Starting from the right ensures that we're dealing with the least significant digits first, which simplifies the calculation process. This method follows the principles of place value, allowing us to decompose the square number into smaller manageable parts and determine the square root iteratively. Taking pairs from the left would not align with the place value system and would make the process more complex and less intuitive. Therefore, the convention is to start from the right when finding the square root of a square number.

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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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