In each of the following questions a number series is given. After the series a number is given followed by (a), (b), (c) , (d) and (e). You have to complete the series starting with the given number, following the sequence of original series and answer the question that follows the series.
$$19 = 3 \times 6 + 1$$
$$103 = 19 \times 5 + 8$$
$$439 = 103 \times 4 + 27$$
$$1381 = 439 \times 3 + 64$$
$$2887 = 1381 \times 2 + 125$$
Similarly,
$$5 \times 6 + 1$$ = 31
$$31 \times 5 + 8$$ = 163
b = 163
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