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

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