Using prime factorisation find hcf and Lcm of 42, 126, 168
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LCM
42= 2×3×7
126= 7× 3×3×2
168= 2×2×2×3×7
LCM=504
HCF=42
42= 2×3×7
126= 7× 3×3×2
168= 2×2×2×3×7
LCM=504
HCF=42
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