4, __, 12, 16, 8, 🟥 🟩 🟨 🟥 🟩 🟨 🟥 🟩 🟨, Rule: Red, Green, Yellow repeats, 2 ,5,7,9, rule addition of 2, 4, 8, 12, __, 16, 7, 14, __, 28, 21, 5, 10, 15, 20 →, add 5, 20, 15, 10, 5 →, subtract 5, A B A B A B →, AB pattern, 2, 4, 8, 16, multiply 2, 🔺 🔵 🔺 🔵 🔺 →, Repeat triangle & circle.

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