If 'BOY' is coded as 42, then 'GIRL' is coded as ? MCQ with Answer and Explanation

Find the next term: 2, 6, 12, 20, 30, 42, ?

If the positions of the first and sixth letters in the word 'BENEFACTOR' are interchanged, similarly the positions of the second and seventh letters are interchanged and so on, which letter will be seventh from the right after rearrangement?

Statements: All flowers are trees. No tree is a plant. Conclusions: I. No plant is a flower. II. Some trees are flowers.