What's the next in the series?

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

I have a mouth but I don't eat.
I have a bank but have no money.
I have a bed but i dont sleep.
I wave but have no hands.

Who Am I ?

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?

The following sentence is false. The preceding sentence is true.
Are these two sentences true or false?

John is the son of Jacob.
So,
Jacob is the_____of John's father?

How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

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

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

I am five letter word that is under you.
If you remove my 1st letter, then I am over you.
If you remove my 1st and 2nd letters then I am all around you.

Who am I?

Why did Navjot Singh Sidhu put the new January calendar in the freezer