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

Choose the correct alternative for the missing term in the sequence:
$Z, S, W, O, T, K, Q, G, ?$

Fill in the blank space for the given series with the correct alternative.
Which term of the series $5, 8, 11, 14, \ldots$ is $320$ (in $^{th}$)?

Complete the given series by selecting the correct alternative: $2, 6, 12, 20, 30, ?$

Fill in the blank space for the given series with the correct alternative.
$212, 179, 146, 113, (\ldots)$

Study the following arrangement carefully and answer the question given below:
$7, R, E, T, 4, A, 9, \%, D, F, 1, U, \#, B, @, 8, H, I, W, M, \star, 3, 2, V, \,5,N,P,6,Q$
How many such numbers are there in the above arrangement,each of which is immediately preceded by a letter but not immediately followed by a symbol?