2, 1, 2, 4, 4, 5, 6, 8, 8, 10, 11, ? | vedclass

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Question

(A) The given series is a combination of two alternating series.
Series $1$ (at odd positions: $1st, 3rd, 5th, 7th, 9th, 11th$): $2, 2, 4, 6, 8, 11$

Vedclass · Accepted Answer

$13$

Vedclass · Answer

(A) The given series is a combination of two alternating series.
Series $1$ (at odd positions: $1st, 3rd, 5th, 7th, 9th, 11th$): $2, 2, 4, 6, 8, 11$
Series $2$ (at even positions: $2nd, 4th, 6th, 8th, 10th, 12th$): $1, 4, 5, 8, 10, ?$
Let us analyze the pattern of Series $2$:
$1 (+3) = 4$
$4 (+1) = 5$
$5 (+3) = 8$
$8 (+2) = 10$
$10 (+3) = 13$.
Thus,the next term is $13$.

$2, 1, 2, 4, 4, 5, 6, 8, 8, 10, 11, ?$

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