Select the number from among the given options that can replace the question mark (?) in the following series.
4, 11, 31, 65, 193, ?
A368
B389
C386
D398
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Related Questions:
283, 94, 31, 10, ?
Refer to the given letter-cluster series and answer the question that follows.
AKMG, RTDC, WQCT, PILE, VTXF, HRXW
If in each of the letter-clusters, each letter is changed to the next letter in the English alphabetical order, how many letter-clusters thus formed will have exactly two vowels?
Select the number from among the given options that can replace the question mark (?) in the following series.
8 18 60 174 528 ?
A series is given with one missing term. Find out the missing term.
198, 187, 173, 162, ?, 137, 123
A series is given with one term missing. Select the correct alternative from the given ones that will complete the series. A, B, D, G, ?