What's the next in the series?

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

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

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.

Find the next number in the series below

21 32 54 87 131 ?

It begins where the time ends.
Its second is an expression of surprise.
Its third is a question.
Its fourth is urinate.
It ends with a drink.

Which country it is?

Suppose that you are trapped on the surface of a frozen lake. The surface is so smooth and ideal that there is no friction at all. You cant make any grip on the ice and no wind is blowing to help you out. You have just a mobile phone with you which has got no reception disabling you to call for help.

How will you plan your escape before you freeze to death on the frozen lake?

Can you name some countries which do not have the alphabet 'A' in them?

How many letters are in the alphabet?

Why do Chinese men eat more rice than Japanese men do ?

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?