A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

I am a five-letter word and comprises two different vowels and three same consonants. I am so strong that I can spoil your entire work.

Can you find out who am I?

What breaks yet never falls, and what falls yet never breaks?

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

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.

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

One day, John and his friends were playing around. Jacob hit something with a Pin and it popped. John's dad came into the room that very moment, but he wasn't mad. In fact, he was smiling. What did Jacob hit?

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

I have a head like a cat and feet like a cat, but I am not a cat. What am I?