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

What does below science rebus mean?

Ag Ag Ag
Ag SPOON Ag
Ag Ag Ag

On a charity event in Russia, Murray beat Djokovic by winning six games and losing three games.
Note: There is a total of 5 service breaks(one who serve lost the game).
Who served first, Djokovic or Murray?

Prove that the below maths equation is true.

8 + 8 = 91

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?

It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?

You need to move three matchsticks to form three squares. Can you do it?

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

You Throw The Outside, Cook The Inside
Eat The Outside, Throw The Inside.

What Is It?