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What is the HCF of 81 and 27?

Practice Questions

Q1
What is the HCF of 81 and 27?
  1. 27
  2. 54
  3. 81
  4. 9

Questions & Step-by-Step Solutions

What is the HCF of 81 and 27?
Correct Answer: 27
  • Step 1: List the factors of 81. The factors are 1, 3, 9, 27, and 81.
  • Step 2: List the factors of 27. The factors are 1, 3, 9, and 27.
  • Step 3: Identify the common factors from both lists. The common factors are 1, 3, 9, and 27.
  • Step 4: Find the largest common factor. The largest common factor is 27.
  • Step 5: Conclude that the HCF of 81 and 27 is 27.
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