10+10 and 11+11 can give you the same answer.

Explain how?

What can you serve, but never eat?

Living above a star, I do not burn
Eleven friends and they do not turn
I can just be visited in a sequence, not once or repeatedly
PQRS are my initials
Can you tell my name accurately?

Some friends went on a vacation to a resort. It was raining heavily and it kept raining for thirteen days.

When it rained in the morning, the afternoon was beautiful and when it rained in the afternoon, the day was blessed with a clear morning.

Overall, the friends experienced eleven nice mornings and twelve nice afternoons. Can you find out the number of days they spent on vacation?

Give it food and it will live; give it water and it will die.

On a bus, there is a 26-year-old pregnant lady.
A 30-year-old policeman.
A 52-year-old random woman.
And the 65-year-old driver.

Who is the youngest?

What has many keys but can’t open a single lock?

I have an eye but still cannot see.

Who am I?

If 24H in a D => 24 hours in a day.
What does "64S on CB" stand for?

My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?