What does this Rebus Picture means ?

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

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

How many times in a given day, minutes and hour clock comes in a straight line ?

John is asked to stand behind Jacob and Jacob is asked to stand behind John. Both of them feel confused about it and don't know what to do?

But it is quite possible, do you know how?

A man hijacks an aeroplane transporting both passengers(8 of them) and valuable cargo. After taking the cargo, the man demands nine parachutes, puts one of them on, and jumps, leaving the other eight behind. Why did he want eight?

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?

Find the smallest sentence with all the English alphabet.

A newspaper is supposed to have 60 pages.Pages 14 and 21 are missing from the newspaper.

Can you tell me , Which other pages won't be there as well ?

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C