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š PREVIEW MODE ā Only you can see this. Back to Admin EduTek Lesson Notes Shop Print PDF Home āŗ SS āŗ Mathematics āŗ Surds I SS 1 Surds I Mathematics SS 1 First Term Introduction to Surds Surds are irrational numbers that can be expressed as square roots (or other roots) of numbers that are not perfect squares (or perfect cubes, etc.). They cannot be simplified to remove the root sign. š Key Concepts: Surd: An irrational number of the form nāa where a is not a perfect nth power. Examples: ā2, ā3, [Preview only]