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For two positive integers a and b, HCF(a, b) x LCM(a, b) equals:
Aa x b
Ba + b
Ca - b
Da / b
Answer & Solution
Correct answer: A. a x b
1. Check with 6 and 20: 2 times 60 is 120.
2. That equals 6 times 20.
3. Use it to find LCM once HCF is known.
_Source: NCERT Class 10 Mathematics, Chapter 1, Real Numbers._
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