Which number would replace the question mark in the series $7, 12, 19, ?, 39$.

Study carefully the following arrangement of letters, digits and symbols to answer these

questions.

$M, 7 ,\&, 8, L ,P ,@ ,Q ,N ,\beta ,T ,Y ,3 ,2 ,= ,E ,\$ ,4 ,9 ,\#, G ,H ,5$

If all the symbols are deleted from the arrangement, which of the following will be fourth to the left of the $17^{th}$ element from the left end ?

Choose the correct alternative to fill in the blanks in the series: $b . . a b b e . . b b c a . . b c a b b . . a b$

Find out the wrong term from the given series:
$380, 188, 92, 48, 20, 8, 2$

Choose the correct alternative to complete the series: $....be...bb....aabc$

Fill in the blank space for the given series with the correct alternative.
$6, 11, 21, 36, 56, (\ldots)$