What number comes next in the series?

5 15 5 18 5 24 14 20 _

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

Replace the question mark with the correct number.

This is a picture puzzle. You have to guess the name of the movie that can be related to the picture.

On my way to St. Ives I saw a man with 7 wives. Each wife had 7 sacks. Each sack had 7 cats. Each cat had 7 kittens. Kittens, cats, sacks, wives. How many were going to St. Ives?

Given below is simple addition with a defined pattern pattern:
7 + 7 = 2
8 + 8 = 4
8 + 5 = 1
6 + 9 = 3
10 + 11 = 9

Can you analyze the pattern and find out the answer for:

4 + 9 = ?

Buy me, smell me or deliver me, I do not change.

Who am I?

What number comes next in this sequence:
7 8 5 5 3 4 4 _

'S' refers to the number of seconds in a day and 'H' refers to the number of hours in ten years. Which quantity out of these two is greater?