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

If eleven plus two equals one, what does nine plus five equal?

I came first on earth but second on the heaven.
I also came twice in a week but found just once in a year.
I stay away from months but you can find me in February.

What am I?

What month of the year has 28 days?

He does not have any heart but still, He manages to live.
If you kill him, you will eventually die but yet you kill him.
He cannot run, who is He?

Count the number of times the letter "F" appears in the following paragraph:

FAY FRIED FIFTY POUNDS OF
SALTED FISH AND THREE POUNDS
OF DRY FENNEL FOR DINNER FOR
FORTY MEMBERS OF HER FATHER'S FAMILY.

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

I can sizzle like bacon,
I am made with an egg,
I have plenty of backbone, but lack a good leg,
I peel layers like onions, but still remain whole,
I can be long, like a flagpole, yet fit in a hole.

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

What Word am I Looking For ?

A man and a dog were going down the street. The man rode, yet walked. What was the dog’s name?