I am big on Saturday and Sunday. Small on Tuesday, Wednesday, and Thursday. I'm not on Monday or Friday. What am I?

Answer: The letter S.

More Classic Riddles with answers

More Classic Riddles

I am born in fear, raised in truth, and I come to my own in deed. When comes a time that I'm called forth, I come to serve the cause of need. What am I?
I am more powerful than god and more evil than the devil. I am what rich people want and what poor people have. I can never die. What am I?
I am six letters. When you take one away I am twelve. What am I?
I am the only thing that always tells the truth. I show off everything that I see. I come in all shapes and sizes. So tell me what I must be! What am I?
I am the son of a chemist and a mathematician. People call me iron 59. What is my name?
I am two-faced but bare only one, I have no legs but travel widely. Men spill much blood over me, kings leave there imprint on me. I have greatest power when given away, yet lust for me keeps me locked away. What am I?
I am white, black and read all over. What am I?
I can be all colours of the rainbow, Or have no colour at all. Sometimes I'm empty, Sometimes I'm full. What am I?
I can flutter and take your breath away. I can take a beating, but do not bruise. If I stopped you would be sure to lose. Everyday I am with you. What am I?
I can slash but I have no knife, I can dash but I have no legs, I can pound but I have no hammer, I can star but I have no stage. What am I?
I can travel from there to here by disappearing, and here to there by reappearing. What am I?
I dig out tiny caves and store gold and silver in them. I also build bridges of silver and make crowns of gold. They are the smallest you could imagine. Sooner or later everybody needs my help, yet many people are afraid to let me help them. Who am I?