What is both possible and impossible at the same time?

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

There was a man he lives in a hotel each morning he presses the first floor button each evening if there is a person in the elevator he asks him to press the 10 floor button if there is no one in the elevator he takes the stairs why.

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

At a bar, three friends, Mr Green, Mr Red and Mr Blue, were having a drink. One man was wearing a red suit; one a green suit; and the other a blue suit. 'Have you noticed,' said the man in the blue suit, 'that although our suits have colours corresponding to our names, not one of us is wearing a suit that matches our own names?' Mr Red looked at the other two and said, 'You're absolutely correct. What colour suit is each man wearing?

A man looks at a painting in a museum and says, “Brothers and sisters I have none, but that man’s father is my father’s son.” Who is in the painting?

What does below science rebus mean?

Ag Ag Ag
Ag SPOON Ag
Ag Ag Ag

What's the next in the series?

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

Can you decipher the following common phrase?

T M C
A U O
H S M
W T E

Why is a river so rich ?