what does the below math rebus puzzle mean?

Two boys wish to cross a river. The only way to get to the other side is by boat, but that boat can only take one boy at a time. The boat cannot return on its own, there are no ropes or similar tricks, yet both boys manage to cross using the boat.

How?

My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

How can you leave a room with two legs and return with six legs?

A boy and a girl are sitting on the porch.
"I'm a boy," says the child with black hair.
"I'm a girl," says the child with red hair.
If at least one of them is lying, who is which?

You bought me for dinner but never eat me. What am I?

I can write cow in 13 letters.

Can You?

Count The number of F's in the paragraph below:

"FINISHED FILES ARE THE RESULT OF YEARS OF SCIENTIFIC STUDY COMBINED WITH THE EXPERIENCE OF YEARS"

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"