1 , why? 217 can only be divided by 1,7 and 217 while 200 is not divisibel by any of the factprs of 217 so the answer is 1.
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31. Factor each number: 62 = 2 x 31 217 = 7 x 31 155 = 5 x 31. The only factor that is common to all three numbers (and thus, the greatest common factor) is 31.
Of course not. In fact, the greatest common factor of two odd numbers is never 2.-- 2 is never a factor of any odd number.-- The greatest common factor of the odd numbers 651 and 1,085 is 217.
The only common factor of 217 and 400 is ' 1 '.
Find a number in that range that you know is a multiple of 7, like 210 or 280. Add 7 to it. 210 and 217 have a GCF of 7. 280 and 286 have a GCF of 7.