How many times can you subtract 10 from 100?

Name two countries that allow taking a nap during work.

Fred’s parents have four sons. They are Spring, Summer, and Autumn. What is the fourth son’s name?

A boy and an engineer were fishing. The boy is the son of the engineer but engineer is not the father of the boy. How is that possible?

It is always pronounced wrong, even by scholars and even by teachers. What is it?

Can you find THE HIDDEN TIGER?

Tom and his younger sister were fighting. Their mother was tired of the fighting and decided to punish them by making them stand on the same piece of newspaper in such a way that they couldn't touch each other. How did she accomplish this?

What relation would your father's sister's sister-in-law be to you?

Connect all the dots with 6 (joint) line segments without lifting your pen off the paper.

I'm as big as an elephant but lighter than a feather. What am I?

An electric train is moving north at 100mph and a wind is blowing to the west at 10mph. Which way does the smoke blow?

There was an airplane crash, every single person on board died, but yet two people survived. How is this possible?