Two minute math: GCF

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Can you name the greatest common factor for each set of numbers?

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NumbersGCF
38, 114
84, 27
72, 28
24/2, 36/2
87, 58
n, n+1
60, 72
2010, (2)(3)(5)(67)
90, 45
65, 39
432, 168
10^6, 5!
98, 70
NumbersGCF
1001, 44
1 googol, 48
117, 63
√(900), √(324)
56, 63, 72
Years in a century, Days in a non-leap year
25, 7555
242, 363
64, 4, 32
2^3, 3^2
Atomic number of Helium, Atomic number of Neon
6, 999

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Created May 31, 2010ReportNominate
Tags:math, Numbers, common, factor, gcf, greatest, minute, set