2. Each question carries 2 marks.
Group - A
1. Find the HCF and LCM of 90, 144 by prime factorisation method.
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Answer: HCF of 90 and 144 is 18, LCM of 90 and 144 is 720. We will explain the prime factorization method to find the HCF and the LCM of 2, 5 and 10.
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