I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

What breaks yet never falls, and what falls yet never breaks?

A man calls his dog from the opposite side of a river. The dog crosses the river without a bridge or a boat and manages to not get wet. How is this possible?

What month of the year has 28 days?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

What you cannot hold but it is yours?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

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?