What goes through cities and fields, but never moves?

What does does this rebus picture means ?

You’re out on the water and see a boat filled with people. You look away for a second and look back again, but this time you don’t see a single person on the boat. Why? Hint: The boat did not sink.

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

What happened when the wheel was invented?

Replace the question mark with the correct number in below Picture:

Which five letter word can be added at the end of below word to form a
valid word?

> Pin
> Check
> Boiling
> View

Can you count the number of triangles inside a triangle?

A man started to town with a fox, a goose, and a sack of corn. He came to a stream which he had to cross in a tiny boat. He could only take one across at a time. He could not leave the fox alone with the goose or the goose alone with the corn. How did he get them all safely over the stream?

What does this rebus means ?