What has a ring but no finger?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

Can you fill the blank with the correct number?

6 30 870 756030 _____

My location can be determined by the below rebus.
So where am i ?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

What does below chemistry rebus means?

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

When it's bad luck to meet a black cat?

A man is walking down a road with a basket of eggs. As he
is walking he meets someone who buys one-half of his eggs
plus one-half of an egg.
He walks a little further and meets another person who buys
one-half of his eggs plus one-half of an egg.
After proceeding further he meets another person who buys
one-half of his eggs plus one half an egg. At this point, he
has sold all of his eggs, and he never broke an egg.
How many eggs did the man have to start with?

You bought me for dinner but never eat me. What am I?