Find the missing term: 2, 7, 27, 107, 427, ?

Answer: Option B

The pattern is +5, +20, +80, +320
i.e. +(5 × 1² ), +(5 × 2² ), +(5 × 4² ), +(5 × 8² )
So, missing term = 427 + +(5 × 16² ) = 427 +1280 = 1707