What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

From a pack of 52 cards, I placed 4 cards on the table.

I will give you 4 clues about the cards:

Clue 1: Card on left cannot be greater than the card on the right.
Clue 2: Difference between the 1st card and 3rd card is 8.
Clue 3: There is no card of an ace.
Clue 4: There are no face cards (queen, king, jacks).
Clue 5: Difference between the 2nd card and 4th card is 7.

Identify four cards?

A charming young lady was approached by a kind looking old woman in a restaurant. The old woman said to her, 'You look exactly like my younger daughter. Sadly she passed away a couple of months back. Could you do me a favor and say 'Goodbye, mother' with a kind smile on your face when I leave?

The young lady agreed for the same and said, 'Goodbye, mother' when the old woman left. Soon after, she got the most disengaging shock of her life.

Can you guess what the shock was?

Our product and our sum always give the same answer. Who are we?

Using Only Five 5's and any mathematical operator make sum as 37

Why Aeroplane windows are round?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

Two-person want to cross a river. Only one boat is present on the riverside that can carry only one person at a time.

However, they still manage to cross the river. How is it possible?

Imagine you are in a room with no windows or doors. How will you get out?