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4 votes
What comes next in the series 21 18 15 12​

User Maxmc
by
5.8k points

2 Answers

4 votes

Answer:

9, 6, 3,0

Explanation:

User Danii
by
6.0k points
4 votes

Answer:

9

Explanation:

User Krylez
by
6.3k points