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

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

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different.

How do you measure 45 minutes?

Which Number is the odd one out?

A) 7145
B) 2716
C) 5321
D) 4135

What has many teeth, but cannot bite?

Consider this: Arnold Schwarzenegger has a big one. Michael J. Fox has a small one. Prince doesn’t have one. The Pope has one but never uses it. Bill Clinton has one and uses it all the time. What is it?

An octopus has 8 legs. A hippogriff has 6 legs and 2 pairs of wings. A sphinx has 6 legs and one pair of wings. Now we have all 3 kinds and a total of 18 insects in a cage. We have a total of 118 legs and 20 pairs of wings. How many insects do we have of each kind?

I am lying and I always lie. Tell me whether I am lying or telling the truth.

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?

How is the moon similar to a dollar?