Cristina was born in 1888. She just had her 30th birthday today how did that happen?

In a rainy season, one day 3 huge ladies walked under a normal-sized umbrella.
The umbrella is not huge enough to accommodate all 3 ladies yet not a single lady got wet. Why?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

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.

There was an aeroplane crash, every single person died, but two people survived. How is this possible?

How many bananas can you eat if your stomach is empty?

You’re out on the water and see a boat filled with people. You look away for a second and look back again, but this time you don’t see a single person on the boat. Why? Hint: The boat did not sink.

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

Can you find a five letter word that is left with only two letters if one is removed?

This is a simple one. You just have to count the number of Fs in the given sentence.

Finished Files are the result of years of scientific study combined with the experience of years.

How many did you count?