Count The number of F's in the paragraph below:

"FINISHED FILES ARE THE RESULT OF YEARS OF SCIENTIFIC STUDY COMBINED WITH THE EXPERIENCE OF YEARS"

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

Make a sentence consisting of three words that have the whole alphabet.

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

What does man love more than life, hate more than death or mortal strife; That which contented men desire; the poor have, the rich require; the miser spends, the spendthrift saves, and all men carry to their graves?

What famous saying does this rebus mean?

COME SERVED <---
COME SERVED
COME SERVED
COME SERVED
COME SERVED

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

What is the end of everything?