When can we add 2 to 11 and get 1 as the correct answer?

What is the next number in this matchsticks series riddle?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

If Bihan is 10, Anirudha is 20, and Kim and Seal are both 5, but Rikold is 10, how much is Kenniger by the same trend?

I can turn polar bears white.
I can make anyone dance.
I can make everyone cry
I can make your hands clap
I can make you thin.
I can make you smile.
I can make you smile

Can you guess the riddle?

Can you identify the direction in which this bus is moving; left or right?

Hint: The bus is moving on the roads of UK.

You are driving down the road in your car on a wild, stormy night, when you pass by a bus stop and you see three people waiting for the bus

An old lady looks as if she is about to die.
An old friend who once saved your life.
The perfect partner you have been dreaming about.
Knowing that there can only be one passenger in your car, whom would you choose?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

I can be cracked, made, told, and played. What am I?