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What are the common factors of 7 and 42?

admin2011-03-08  8
问题 What are the common factors of 7 and 42?
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答案 Remember that common factors are all of the factors that two or more numbers share. The factors of 7 are 1 and 7 because 7 is a prime number. The factors of 42 include 1 (42×1=42) and 7 (6×7=42), so the common factors of 7 and 42 are 1 and 7.
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