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One number in this series is wrong: 3, 3, 6, 18, 72, 350, 2160. Which is it?

Competition practiceNumber Series

A350
B72
C2160
D18

Step-by-Step Solution

Rule: ×

1, \times 2, \times 3, \times 4, \times 5, \times 6.72 \times 5 = 360

, not 350; and

360 \times 6 = 2160

confirms it.

Answer: A) 350

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