What goes up but never comes down?

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

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?

There are hundred red gems and hundred blue gems. The blue gems are priceless while the red gems equal wastage. You have two sacks one labeled Heads and the other Tails. You have to distribute the gems as you want in the two sacks. Then a coin will be flipped and you will be asked to pick up a gem randomly from the corresponding sacks.

How will you distribute the gems between the sacks so that the odds of picking a Blue gem are maximum?

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

Four men were in a boat on the lake. The boat turns over, and all four men sink to the bottom of the lake, yet not a single man got wet! Why?

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

The cream is heavier than Milk. True or False?

Which letter of the alphabet has the most water?