Before Mount Everest was discovered, what was the highest mountain in the world?

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

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

Pronounced as one letter,
And written with three,
Two letters there are,
And two only in me.
I am double, I am single,
I am black blue and grey,
I am read from both ends,
And the same either way.

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?

The dirtier I get, the whiter I look. Who am I?

Can you spot what's wrong with the following sentence?

PETER WAS ANGRY AT
HIMSELF BECAUSE HE
ACCIDENTALLY LEFT THE
THE KEYS TO HIS CAR
AT HIS FRIEND'S HOUSE.

What is the riddle which can be asked all day with a different correct answer each time.

What word begins and ends with an E, but has only one letter?

I am a normal creature, but I have five hands. I can even have more but even then I will be considered normal.

Who am I?