I have feet, but no legs. Which animal Am I?

Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?

What's a single-digit number with no value?

The picture shows the dice results in each couple of throws. If they are actually following a pattern, can you find out the missing one?

If Rajina's daughter is my daughter's mom, who am I to Rajina?

A game is being played where eight players can last for thirty-five minutes. Six substitutes alternate with each player in this game. Thus, all players are on the pitch for the same amount of time including the substitutes.

For how long is each player on the pitch?

If 21x = 79x, what is the value of x?

There are people and strange monkeys on this island, and you can not tell who is who (Edit: until you understand what they said - see below). They speak either only the truth or only lies.
Who are the following two guys?
A: B is a lying monkey. I am human.
B: A is telling the truth.

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?