Discussion
Find the missing number in the series:
10, 7, 4, 1, ?
Answer: D
Correct answer: -2
Each term is 3 less than the one before: \( 10 - 3 = 7 \), \( 7 - 3 = 4 \), \( 4 - 3 = 1 \). Continuing past zero gives \[ 1 - 3 = \mathbf{-2} \]
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