What is both possible and impossible at the same time?

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

I am first found in caves, now prolific online; I am a depiction, a drawing, a symbol, or sign. I will convey whichever mood you could wish; or for that matter, a fist, flask, or fish. What am I?

On the dull night when the blonde was dozing, she heard an odd clamour and she saw that there was a bizarre man with a gun simply outside her home. So she raced to the telephone to call the police, however, she can't dial 911. Why?

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

Women do it once a year after they turn 19 but men get to do it only once in a lifetime. What is it?

He loves to dance, twist and prance, he shakes his tail, and as a way he sails, wingless he flies into the sky. What is he?

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98

You have a square. What you have to do is cut and reassemble the square such that you create a Red Cross sign that has the same volume as that of the square.