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

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