12 riddles that will completely make you feel like an idiot

Many have heard me, but no-one has seen me, and I will not speak back until spoken to. What am I?

Alone I am 24th, with a friend I am 20. Another friend and I am unclean. What am I?

When is 99 more than 100?

I’m teary-eyed but never cry, silver-tongued, but never lie. double-winged, but never fly, air-cooled, but never dry. What am I?

How can a pants pocket be empty and still have something in it?

What is the longest word in the English dictionary?

Poke your fingers in my eyes and I will open wide my jaws. Linen cloth, quills, or paper, I will devour them all. What am I?

When you need me, you throw me away. But when you’re done with me, you bring me back. What am I?

If it’s information you seek, come and see me. If it’s pairs of letters you need, I have consecutively three. What am I?

We hurt without moving. We poison without touching. We bear the truth and the lies. We are not to be judged by our size. What am I?

Smell me, buy me, and deliver me. Still, I won’t change. What am I?

What I build, I build stronger than either the mason, the shipwright, or the carpenter. What am I?