How could a baby fall out of a twenty-story building onto the ground and live?

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

In a supermarket, there is an intelligent glass pane before a refrigerating unit. This glass pane allows cherries and apples through it but does not allow grapes and Orange to pass through it.

Can you identify the rule that the glass pane is following?

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

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

"That Restaurant always remains crowded. This is the reason why nobody goes there".

Can you find a flaw in this statement?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

What is a word made up of 4 letters, yet is also made up of 3. Sometimes is written with 9 letters, and then with 4. Rarely consists of 6, and never is written with 5.

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

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