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State with reason, whether the following is a surd. sqrt(140) - Mathematics

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Question

State with reason, whether the following is a surd. 

`sqrt(140)`

Give Reasons
Sum
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Solution

`sqrt(140)` is a Surd

Reason:

140 is a positive rational number.

Square root of 140 is not a perfect square, thus irrational.

It’s a surd.

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Chapter 1: Rational and Irrational Numbers - EXERCISE 1C [Page 15]

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B Nirmala Shastry Mathematics [English] Class 9 ICSE
Chapter 1 Rational and Irrational Numbers
EXERCISE 1C | Q 1. (ii) | Page 15
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