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well 18: 2 times 3 times 3

and 63: 3 times 3 times 7

and 117:3 times 3 times 13

the number tat ocurs the most is :3 and 3

so u multiply 3 times 3 = 9

so the GCD IS 9!

hope this helps and byee

done by: Paven Samrai

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โˆ™ 2011-04-20 01:41:32
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Q: What is the Greatest Common Divisor of 18 and 63 and 117?
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