They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

If a wheel has 54 spokes, how many spaces are there between the spokes?

Before Mount Everest was discovered, what was the highest mountain in the world?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

Seven Robbers robbed a bank and hide the coins in a lonely place.
They decide to divide the money equally the next morning. Two greedy robbers decided to cheat the others and reach the place at night. They equally divided the coins between them, one coin left. So they called another robber and then they decided to divide equally among the three. Sadly again one coin left. The same thing happened to the 4th 5th and the 6th robber.
However, when the 7th robber reached in the morning, they can divide the coins equally.

How many coins were there in total?

I am under you when I am whole.
I shift above you if you remove the first letter.
I come all around you if you remove the second as well.

Can you tell me who I am?

Lifeless eyes on my smiling face and watch your child's sleeping place. In their dreams they hold me tight. What am I?

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.

What is the riddle which can be asked all day with a different correct answer each time.

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?