Which number would replace underline mark in the series

2, 5, 10, 17, ---, 37

Which of the following is exactly in the middle between the tenth from the left and the eighth from the right end

How many such consonants are there in the above arrangement, each of which is immediately preceded by a symbol and immediately followed by a number

How many such numbers are there in the above arrangement, each of which is immediately followed by a consonant and immediately followed by a symbol

Which of the following is the seventh to the right of the nineteenth from the right end

Which of the following is the third to the right of the twelth from the left end of the above arrangement