Only one color, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?

What does it mean?

There are 3 apples in the basket and you take away 2. How many apples do you have now?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

The day after tomorrow will be three days before Tuesday. Can you find out what is today?

In a science lab, a petri dish hosts a healthy colony of yeast for an experiment. Now every minute, all the yeast cells divide into two. At noon, there was just a single cell of yeast and at 1:22, the Petri dish was half full. Can you calculate when the dish will be full of yeast?

I come in different shapes and sizes.
Parts of me are curved, other parts are straight.
You can put me anywhere you like,
but there is only one right place for me.
What am I?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

Which is the smallest number that you can write using all the vowels exactly once?

People put me on the table and cut me but do not eat me. What am I?