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Classify the Numbers ` Sqrt (21)` as Rational Or Irrational: - Mathematics

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Classify the numbers ` sqrt (21)` as rational or irrational: 

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Solution

` sqrt (21 ) = sqrt (3) xx sqrt (7) `is an irrational number because √3 and √7 are irrational and prime numbers.

Concept: Concept of Irrational Numbers
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APPEARS IN

RS Aggarwal Secondary School Class 10 Maths
Chapter 1 Real Numbers
Q 2.09
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