Second and third digits of each number given below are interchanged. Then,the $1st$ and the last digits of each new number thus formed are interchanged. Which of the following numbers then will be the highest number among the five?
$273, 372, 438, 184, 526$

What will be the next term in the series: $BDF, CFI, DHL, ?$

Fill in the blank space for the given series with the correct alternative.
$4, 9, 13, 22, 35, (\dots)$

Study the following arrangement carefully and answer the question.
$O, 4, E, J, 5, T, 1, A, M, Q, 3, 8, N, I, K, 7, W, F, 6, S, 9, U, 2, Y, X$
If all the numbers in the above arrangement are dropped,which of the following will be the ninth to the left of $S$?

Study carefully the following arrangement of letters, digits and symbols to answer these

questions.

$M, 7 ,\&, 8, L ,P ,@ ,Q ,N ,\beta ,T ,Y ,3 ,2 ,= ,E ,\$ ,4 ,9 ,\#, G ,H ,5$

If all the symbols are deleted from the arrangement, which of the following will be fourth to the left of the $17^{th}$ element from the left end ?

Choose the correct alternative to complete the series: $b e . . b . . c . . b . . c c b$