Answer:
GCF is 2.
Explanation:
GCF is just the greatest factor of the whole number series.
Everything is divisible by 2 and not anything greater in this number series.
Therefore the GCF is 2.
2
4 = 2 * 2
10 = 2 * 5
12 = 2 * 2 * 3
16 = 2 * 2 * 2 *2
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