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🔍 PREVIEW MODE – This note is not yet published. Only you can see this. Back to Admin EduTek Lesson Notes Shop Print Back to Admin Home » SS » Mathematics » Surds SS Surds Mathematics SS 2 SS Introduction to Surds A surd is an irrational number that contains a radical sign (√) and cannot be simplified to a rational number. 📌 Key Points: A surd has a square root that is not a perfect square. Surds are irrational numbers. Examples: √2, √3, √5, √7 Not surds: √4 = 2, √9 = 3, √16 = [Preview only]