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The highest common factor of 6, 72 and 120 is:

A4
B2
C3
D6
Answer & Solution
Correct answer: D. 6
1. The common primes are 2 and 3. 2. The smallest powers are 2 and 3 themselves. 3. The answer is 6. _Source: syllabus Mathematics, Chapter 1, Real Numbers._
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