Three brothers Jacob, John, and James live in Mexico City. The product of the ages of these brothers is 175. Jacob and John are twins. How old is James?

Remove two matchsticks to make the below equation correct.

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

If you paint a brown house white it will become a white house. If the stoplight changes from red to green, then the light is green. So, if you throw a white shirt into the Red Sea, what will it become?

How far can you walk into the woods?

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.

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

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

In a boat, the father of a sailor's son is sitting with the son of the sailor. However, the sailor is not present on the boat.

Can this even be possible?

Which letter of the alphabet has the most water?