Answer:
By prime factorization method, Factors of 3930 and 1800 are,
2 3930 3 1965 5 655 131 131 1
2 1800 2 900 2 450 3 225 3 75 5 25 5 5 1 So, \[3930=2\times 3\times 5\times 131\] \[1800=2\times 2\times 2\times 3\times 3\times 5\times 5\] Then, \[\text{HCF}=2\times 3\times 5=30\] and, \[\text{LCM}=2\times 3\times 5\times 131\times 2\times 2\times 3\times 5\] \[=235800\]
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