What does this rebus puzzle means ?

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

You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?

What does this simple rebus mean?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

If,

A + B = C
D - C = A
E - B = C

Based on the above equations, find out the answer for:

D + F = ?

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

There is so small cabin inside a deep forest.
All the forest burned out to worst possible but the inside of the cabin is still the same.
However all the person inside the cabin die.

How come ?

What can you see in the middle of March and April that you can never see in any other month?