What do you call a fish without an eye?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

Which statement is true out of the following?
One statement here is false.
Two statements here are false.
Three statements here are false.

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

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?

There once were seven dwarfs who were all brothers. They were all born two years apart. The youngest dwarf is seven years old. How old is his oldest brother?

The captain of a ship is telling you an interesting story and then poses a question. He says, “I have travelled the oceans far and wide. One time, two of my sailors were standing on opposite sides of the ship. One was looking west and the other one east. And at the same time, they could see each other clearly. Can you tell me how that was possible?”

What is the probability of choosing the correct answer at random from the options below?

a) 1/4
b) 1/2
c) 1
d) 1/4

Can you identify if it's a murder or a suicide ?

Our product and our sum always give the same answer. Who are we?