Cristina was born in 1888. She just had her 30th birthday today how did that happen?

You are given 2 eggs.
You have access to a 100-storey building.
Eggs can be very hard or very fragile means it may break if dropped from the first floor or may not even break if dropped from 100th floor, Both eggs are identical.
You need to figure out the highest floor of a 100-storey building an egg can be dropped without breaking.
Now the question is how many drops you need to make. You are allowed to break 2 eggs in the process

What can go up a chimney down, but can’t go down a chimney up?

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

I can be made.
I can be cracked.
I can be told.
I can be played.

Who am I?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

Can you start the fire using two pieces of wood?

John can place six large boxes or nine small boxes into a carton.

Can you find out in how many cartons can he place sixty-six boxes in total?

I am a ten letters word
The first four letters have the power to rule,
Next, four-letter can be eaten.
The next three-letter represents a lady.
I can fly as well

what am I looking for?

In one of the popular batman series movie "Batman Forever", there was a riddle that goes like "Tear me off and then scratch my head and I was red then and now I am back. Who am I?