Discussion
Find out the wrong number in the given sequence of numbers 105, 85, 60, 30, 0, -45, -90
Answer: D
The gaps should widen by 5 each time.
\[ 105 \xrightarrow{-20} 85 \xrightarrow{-25} 60 \xrightarrow{-30} 30 \xrightarrow{-35} -5 \xrightarrow{-40} -45 \xrightarrow{-45} -90 \]
The fifth term should be \( 30 - 35 = -5 \), not 0.
So 0 is the wrong number. Every term after it fits the corrected value, which confirms the single break.
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