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1.Given that HCF (135,225)=45.Find LCM (135,225)

2.State Euclid's Division Lemma and hence find HCF of 16 and 28.

3.State fundamental theorem of Arithmetic and hence Check whether 5×6×2×3+3is a composite number.

4.Prove that 1/2−√5 is irrational number.

5.If the HCF of 210 and 55 is expressible in the form 210×5+55y then find y.

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by nainitha9797

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