Abraham Lincoln (Square Root)

The Abraham Lincoln (Square Root) method is a mental calculation approach for finding the square root of a number. It involves making an educated guess, then refining that estimate by averaging it with the result of dividing the original number by your guess. Repeating this process quickly hones in on the true square root. Named after Abraham Lincoln due to his reputed ability to perform quick mental math, this technique leverages iterative approximation, making it a practical and efficient way to estimate square roots mentally without complex tools.