People make me, save me, change me, raise me. What am I?

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

If you go to the movies and you're paying, is it cheaper to take one friend to the movies twice, or two friends to the movies at the same time?

Doctor Alex and a bus driver John are both in love with the same woman named Olivia. The bus driver need to go for a long trip of 10 days, Before he left he gave Olivia 10 apples.

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

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

Do you know of a place where the wind blows south and then suddenly shifts direction towards the north?

Can you place six X (crosses) in below board without making three in a row in any way ?

Can you count the number of squares in the given picture?

John: "Hi Teacher, What is your favourite movie ?".
Chemistry Teacher: "Indium Cerium Platinum Iodine Oxygen Nitrogen".
Ten seconds later... John replied I got it.

Do you?