Choose the correct alternative for the missing term in the series:
$A, B, D, G, ?$

Fill in the blank space for the given series with the correct alternative.
$840, 168, 42, 14, 7, (...)$

Choose the correct alternative for the missing term in the series: $? , ayw, gee, mki, sqo$

Fill in the blank space for the given series with the correct alternative.
$3, 10, 20, 33, 49, 68, (\ldots)$

Fill in the blank space for the given series with the correct alternative.
In the series $10, 17, 24, 31, 38, \ldots$,which of the following will be a number of the series?

Choose the correct alternative to complete the series:
$...baa...aab...a...a$