Can you start the fire using two pieces of wood?

The more of this there is, the less you see. What is it?

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?

I have nine bottles of wine and one of the nine bottles is poisoned.
I need to find the poisoned bottle with two facts
(1) Poison is deadly, only a sip will cost death
(2) I have two mice to do so.

How should I do it?

Can you find the missing piece of the Porsche?

A woman shoots her husband.

Then she holds him under water for over 5 minutes.

Finally, she hangs him.

But 5 minutes later they both go out together and enjoy a wonderful dinner together.

How can this be?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

How can one talk without saying a single word?

What do you see in the given picture?