What comes next in the given pattern?
$10, 19, 40, 77, 158, . . . . . . . . . .$

311

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307

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301

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299

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Solution

The correct option is B $311$
$10 \times 2 = 20 - 1 = 19$
$19 \times 2 = 38 + 2 = 40$
$40 \times 2 = 80 - 3 = 77$
$77 \times 2 = 154 + 4 = 158$
$158 \times 2 = 316 - 5 = 311$
Hence, option $A$ is answer.

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