Fill in the blank space for the given series with the correct alternative.
$121, 225, 361, (\ldots)$

To answer these questions, study the following arrangement of digits, letters and symbols carefully.

$6, N,P ,=,@, 7,1 ,\& , R, T, 3, L, ,B, \star, E ,4,\# , 8, G,H ,\$, 5, K,M ,?, 2, D,C$

Four of the following five are alike in a certain way based on the positions of the elements in the arrangement and hence form a group. Which one does not belong to the group?

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

Study the following arrangement carefully and answer the question given below.
$Q, E, *, P, M, 8, R, A, @, C, 9, U, H, W, \#, J, Z, S, \beta, Y, N, 5, \,G,I,T$
How many such vowels are there in the above arrangement,each of which is immediately followed by a symbol?

Find out the wrong term from the given series:
$3, 10, 27, 4, 16, 64, 5, 25, 125$

Following questions are based on the five three-digit numbers given.
$513, 248, 371, 634, 167$
If the position of the first and third digits in each of these numbers are interchanged,which of the following will be the highest number among them?