100+ Hard riddles to test your mental acuity

Two fathers and two sons are in a car, yet there are only three people in the car. How?

Take one out and scratch my head I am now black but once was red.

The 22nd and 24th presidents of the United States of America had the same parents but were not brothers. How can this be possible?

What runs, but never walks. Murmurs, but never talks. Has a bed, but never sleeps. And has a mouth, but never eats?

You walk into a room that contains a match, a kerosene lamp, a candle, and a fireplace. What would you light first?

 Jared's father has three sons, Snap, Crackle and?

Imagine you are deserted on an island lighted up with fire. You have no bucket so you cannot use the seawater. How do you escape?

What is the only English word, with two synonyms that are antonyms of each other?

Voiceless it cries, wingless flutters, toothless bites, mouthless mutters.

What can fill a room but takes up no space?

Did you hear about the boy who went to his senior prom dressed in a t-shirt and jeans. He was arrested by the fashion police. What was he charged with?

What spends all the time on the floor but never gets dirty?

What's black when you get it, red when you use it, and white when you're all through with it?

What runs around the whole yard without moving?

If your uncle's sister is not your aunt, what relation is she to you?