What four weights can be used to balance from 1 to 30 pounds?

In which direction should the missing arrow point?

A woman lives in a skyscraper thirty-six floors high and is served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

What has lots of eyes, but can’t see?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

One night, a woman receives a call from the police. They tell her that her husband was murdered and that she should come to the crime scene as soon as possible. The woman drops the phone, shocked, and drives 20 minutes to the crime scene. As soon as she reaches the crime scene, the police arrest her and she is convicted of murder. How do the police know she committed the crime?

How is the moon similar to a dollar?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

Can you complete the sequence puzzle?

AR TA GE CA LE VI LI _