What is so fragile that saying its name breaks it?

What's the next in the series?

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

Open a Laptop which is password protected. Hint for the password is given as below:

1 mobile 3 books 2 Boards 1 night 4 balls 2 lighters 1 ghost 1 hat 3 watches

What you cannot hold but it is yours?

The centre of the third figure is empty. What digit should fit inside?

In the attached figure, you can see a chessboard and two rooks placed on the chess board. What you have to find is the number of squares that do not contain the rooks. How many are there?

You are a prisoner sentenced to death. The Emperor offers you a chance to live by playing a simple game. He gives you 50 black marbles, 50 white marbles, and 2 empty bowls. He then says, 'Divide these 100 marbles into these 2 bowls. You can divide them any way you like as long as you use all the marbles. Then I will blindfold you and mix the bowls around. You then can choose one bowl and remove ONE marble. If the marble is WHITE you will live, but if the marble is BLACK... you will die.'

How do you divide the marbles up so that you have the greatest probability of choosing a WHITE marble?

What is the next number in this matchsticks series riddle?

James bond was pushed out of an aeroplane without any parachute.
He survived, How come?

Which English verb becomes past tense just by rearranging the letters?