Lateral Thinking Riddles

When does tomorrow come before yesterday?

What is at the end of a rainbow?

What has no beginning, no middle, and no end?

I am white when dirty and black when clean. What am I?

A teacher asks a student to spell wrong. The student spells W-R-O-N-G. Was the student right or wrong?

How many months have 28 days?

The faster you run, the harder I am to catch. Yet I am always the same distance ahead of you. What am I?

What is half of 8? There are two correct answers.

You must throw me away to use me. You only use me once. I am essential on birthdays. What am I?

What does a ceiling have that a floor does not?

If a ship captain has 15 fish and the sea is full of sharks, how many fish does he have?

A bear walks one mile south, one mile east, then one mile north and ends up exactly where it started. What colour is the bear?

I am the number that changed mathematics. I am nothing, yet without me, nothing works. I was invented twice — once in India and once in Mesoamerica. What am I?

I am a party where the guest of honour cannot attend. I am a gathering held for someone who no longer gathers. I am sombre yet I often end with stories and laughter. What am I?

I start without warning and end without explanation. Every cure for me is disputed. I have no known useful purpose. I am your body surprising itself. What am I?

I am Britain's national sport that is not a sport. I require patience, not skill. I have invisible rules that everyone knows. Jump to the front of me at your peril. What am I?

I am the most contagious thing that is not a disease. Thinking about me makes you do me. Even reading this sentence might cause one. What am I?

On me, going up forever never gets you higher. Going down forever never gets you lower. I exist in art but not in physics. What am I?