Tick the number that will come next in the following sequence:
$4, 6, 12, 14, 28, 30, (\ldots)$

Fill in the blank space for the given series with the correct alternative.
$34, 18, 10, 6, 4, (...)$

Fill in the blank space for the given series with the correct alternative.
$2, 6, 12, 20, 30, 42, 56, (\ldots)$

The following question is based on the five three-digit numbers given:
$513, 248, 371, 634, 167$
Which of the following represents the sum of all three digits of the lowest number among them?

Choose the correct alternative for the missing term in the series: $G 4 T, J 10 R, M 20 P, P 43 N, S 90 L$.

Choose the correct alternative to complete the series: $cccbb...aa...cc...bbbaa...c$