If the digits in the number $5, 7, 3, 4, 6, 2, 9$ are arranged in ascending order from left to right,how many digits will remain at the same position?

Choose the correct alternative to fill in the blanks in the series: $abca....bcaab....ca....bbc...a$

Fill in the blank space for the given series with the correct alternative.
$2, 3, 8, 63, (\ldots)$

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

These questions are based on the following set of numbers.
$738, 495, 329, 653, 849$
If $1$ is added to the first digit of each number and $1$ is subtracted from the second digit,which number will be the largest?

How many such digits are there in the number $5231698$ each of which is as far away from the beginning of the number as when the digits are rearranged in ascending order?