Question
What are the common factors of 75, 60 and 210?
Answer: Option A
:
A
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A
Factors of 75 are 1, 3, 5, 15, 25 and 75.
Factors of 60 are 1, 2, 3, 4, 5, 6, 10, 12, 15, 30 and 60.
Factors of 210 are 1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 70, 105 and 210.
∴ Common factors of 75, 60 and 120 are 1, 3, 5 and 15.
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