Question 12

Which number will replace the question mark (?) in the following series?
2, 3, 8, 31, ?

Solution

Here the logic of the series is -

$$ 2 \times 2 -1=3 $$

$$ 3 \times 3 -1=8 $$

$$ 8 \times 4 -1=31 $$

So, the next one will be

$$ 31 \times 5 -1=154 $$

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