Which of the following will come in place of the question mark $(?)$ in the order given below?
$AE, CG, EI, GK, ?$

Fill in the blank space for the given series with the correct alternative.
$9, 12, 11, 14, 13, (\ldots), 15$

Study the following arrangement carefully and answer the question given below:
$B, 2, I, J, K, 4, 3, H, 5, E, R, P, 6, N, A, 9, W, 8, T, U, 1, V, D, 7, F$
Four of the following five are alike in a certain way and so form a group based on their positions in the given arrangement. Which is the one that does not belong to this group?

One term in the number series is wrong or missing. Find it.
$2, 3, 5, 8, 13, 34$

Study the following arrangement carefully and answer the questions given below:

$7, R,E,T ,4 ,A ,9 ,\% ,D,F, 1, U, \# ,B ,@ ,8 ,H,I ,$©$, W,M, \star, 3,2 ,V ,\$ ,5 ,N,P,6, Q$

Four of the following five are alike in a certain way based on their position in the above arrangement and so form a group.

Which is the one that does not belong to the group?

Choose the correct alternative to complete the series: $...bcdbc...dcabd....bcdbc....dc....bd$