Discussion
Find out the wrong number in the series 19, 26, 33, 46, 59, 74, 91
Answer: B
The gaps should be the odd numbers, rising by 2 each time.
\[ 19 \xrightarrow{+7} 26 \xrightarrow{+9} 35 \xrightarrow{+11} 46 \xrightarrow{+13} 59 \xrightarrow{+15} 74 \xrightarrow{+17} 91 \]
The third term should be \( 26 + 9 = 35 \), not 33.
So 33 is the wrong number - every term after it fits the corrected value.
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