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To find this, you first have to split the numbers into their prime factors:
18 = 2x3x3
54 = 2x3x3x3
The next step is to identify any common prime factors. In this case both numbers have a 2 and two 3s as prime factors. Multiply these together gives you:
2x3x3 = 18
Therefore the HCF of 18 and 54 is 18.
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Related Questions
What is the gcf of18 36 and 54?
It is: 18
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3 and 18 6 and 9
What is the HCF of 54 and 504?
The GCF/HCF of 54 and 504 is 18.
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Hcf of 12 and 54?
HCF is the highest common factor of two or more numbers. HCF of 12 and 54 is 6.
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What is the HCF of 18 54 and 81?
hcf(18, 54, 81) = 9. Using prime factorization: 18 = 2 x 3^2 54 = 2 x 3^3 81 = 3^4 hcf = 3^2 = 9
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