Find out the wrong term in the series 169,144,121,100,85,64

144

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100

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Solution

The correct option is C 85
The sequence is $13 \times 13, 12 \times 12, 11 \times 11, 10 \times 10, 9 \times 9, 8 \times 8, . . . . . .$
So, 85 is wrong term and must be replaced by $9 \times 81$

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