Answer:
The missing number would be 9.
Explanation:
I found out that the rule is 3 multiplied.
3 times 3 = 9
9 times 3 = 27
27 times 3 = 81
81 times 3 = 243
27 * 3 = 81
81 * 3 = 243
Each term is 3x the number before it. Therefore:
3 * 3 = 9
The missing number is 9.
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