Find out the value of '?':

8

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11

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9

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10

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Solution

The correct option is D $9$
$b = a^{3} - a^{2} + a$
For eg. $6 = 2 \times 2 \times 2 - 2 \times 2 + 2$
$= 8 - 4 + 2$
$657 = 9 \times 9 \times 9 - 9 \times 9 + 9$

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