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Question

Find the greatest common factor of 42,126 and 210.

A
2
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B
6
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C
14
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D
21
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E
42
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Solution

The correct option is E 42
We know, 42=2×3×7
126=2×3×3×7
210=2×3×5×7
H.C.F =2×3×7=42

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