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The highest common factor of 6 and 20 is:

A2
B4
C6
D8
Answer & Solution
Correct answer: A. 2
1. 6 is 2 times 3 and 20 is 2 times 2 times 5. 2. Only one 2 is shared. 3. The answer is 2. _Source: syllabus Mathematics, Chapter 1, Real Numbers._
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