How many such digits are there in the number $52361984$ each of which is as far away from the beginning of the number as when the digits are rearranged in ascending order within the number?

Two terms have been put within brackets. Mark your answer as:
$4, 7, (9), 10, 13, 15, (16), 19$

Study the following arrangement carefully and answer the question.
$O, 4, E, J, 5, T, 1, A, M, Q, 3, 8, N, I, K, 7, W, F, 6, S, 9, U, 2, Y, X$
Four of the following five are alike in a certain way based on their positions in the above arrangement and so form a group. Which is the one that does not belong to this group?

Find out the wrong term from the given series:
$3, 4, 10, 32, 136, 685, 4116$

Choose the correct alternative for the missing terms in the series: $Y, W, U, S, Q, ?, ?$

Choose the correct alternative for the missing term in the series: $deb, ijg, nol, ?, xyv$.