what's the probability of getting a king or a queen from a pack of 52 cards?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

People are waiting in line to board a 100-seat aeroplane. Steve is the first person in the line. He gets on the plane but suddenly can't remember what his seat number is, so he picks a seat at random. After that, each person who gets on the plane sits in their assigned seat if it's available, otherwise, they will choose an open seat at random to sit in. The flight is full and you are last in line. What is the probability that you get to sit in your assigned seat?

Intelligence Agency need to break the vault but the problem is that they are not able to break the vault.

On the vault, a text is written as:

31 11 33 33 43 45
21 25
31 24 11 31 51 41

To Break the code Intelligence Agency brings a mathematician named Joseph.
Minutes later he deciphers the code.

Whats the code?

A thief enters a store and threatens the clerk, forcing her to open the safe. The clerk says, “The code for the safe is different every day, and if you hurt me you’ll never get the code.” But the thief manages to guess the code on his own. How did he do it?

Why are televisions attracted to people?

What's the next in the series?

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

Count the Triangle in the figure given below:

The more of this there is, the less you see. What is it?