Find out the wrong term from the given series.
$8, 14, 26, 48, 98, 194, 386$

Fill in the blank space for the given series with the correct alternative.
$3, 7, 15, 31, 63, (\dots)$

Study the following arrangement carefully and answer the question.
$O, 4, E, J, 5, T, 1, A, M, Q, 3, 8, N, I, K, 7, W, F, 6, S, 9, U, 2, Y, X$
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?

These questions are based on the following set of numbers.
$738, 495, 329, 653, 849$
If $1$ is subtracted from the last digit of each number and then the numbers are arranged in descending order,which number will be the first?

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: $G 4 T, J 10 R, M 20 P, P 43 N, S 90 L$.