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Classify the following number as rational or irrational: sqrt225

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Question

Classify the following number as rational or irrational:

`sqrt225`

Sum
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Solution

∵ 225 = 15 × 15 = 152

∴ 225 is a perfect square.

Thus, `sqrt225` is a rational number.

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Chapter 1: Number Systems - Exercise 1.4 [Page 31]

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RD Sharma Mathematics [English] Class 9
Chapter 1 Number Systems
Exercise 1.4 | Q 3.11 | Page 31
NCERT Mathematics [English] Class 9
Chapter 1 Number Systems
EXERCISE 1.3 | Q 9. (ii) | Page 14
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