I’m tall when I’m young, and I’m short when I’m old. What am I?

Do You See It?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

Move three sticks of the spiral below to form a square.

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?

I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth, I am dissolved into air. What am I?

What happened when the wheel was invented?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

There is something which you can be arrested for attempting but not for successfully completing.