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1. Real Number
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Q5 of 44 Page 1

We know,


1st number × 2nd number = HCF × LCM


⇒ 27 × 2nd number = 9 × 459


⇒ 2nd number =


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7

Prove that √3 is irrational. (CBSE 2008, 2009)

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Given that √2 is irrational, prove that (5 + 3 √2) is an irrational number. (CBSE 2018)

6

7

Find HCF and LCM

Questions · 44
1. Real Number
1 2 3 4 5 5 6 7 8 5 6 7 8 9 10 11 12 13 14 15 9 10 11 12 13 14 15 16 17 18 11 12 13 14 15 16 17 18 1 2 3 4 5 6
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