Memorising key square roots and using mental math tricks saves time. Techniques like the nearby perfect square trick and weighted averaging enhance problem-solving skills.

Square root days happen only a few times in a century, and the man who brought the day fame is celebrating his sixth one.

US Tests the World’s Largest $200 Million Drone: Meet the RQ-4 Global Hawk Why oil is tumbling and stocks are rising after Iran launched missiles at US bases See images from the Rubin telescope ...