What two things can you never eat for breakfast?

What always comes into a house through the keyhole?

I am a type of vehicle that has two wheels and is powered by humans. What am I?
Hint 1: You can ride me for exercise.
Hint 2: I am environment-friendly.

Alex opened 24 presents
Jonah opened 8 presents
Clara opened 1 present

Can you find out how many presents were opened by Candy?

what's the probability of getting a king or a queen from a pack of 52 cards?

A detective visits his friend John just to discover that John's neighbour Dr Jacob was murdered. Dr Jacob, who is a mathematician wrote the murderer's name in a code word "Hcqtfz". There were five suspects
1. Ajit
2. Pankaj
3. Ganpat
4. Deenu
5. Hariya

The Detective was instantly able to find the murderer.
Can you?

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

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

How many sides does a circle have?