I shave every day, but my beard stays the same. What am I?

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?

Can you find out the remainder when 3^300 is divided by 5?

How can you throw a ball as hard as you can and have it come back to you even if it doesn't hit anything there is nothing attached to it and no one else catches or throws it.

On a bus, there is a 26-year-old pregnant lady.
A 30-year-old policeman.
A 52-year-old random woman.
And the 65-year-old driver.

Who is the youngest?

What does does this rebus picture means ?

Find the missing number in the sequence below:

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

2, 3, 5, 9, 17, _ What is the next number in the sequence?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?