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

I am eight letters long - "12345678"
My 1234 is an atmospheric condition.
My 34567 supports a plant.
My 4567 is too appropriate.
My 45 is a friendly thank-you.
My 678 is a man's name.

What word am I?

I look at you, you look at me I raise my right, you raise your left. What am I?

Can you find a five letter word that is left with only two letters if one is removed?

A network of 20 x 10 squares is given to you.

Can you calculate how many unique squares and rectangles can be formed combining two or more individual squares ?

In a football game, Christina defeated Teresa by 2 - 0 but no man from either side scored. How can this be possible?

An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?

If an electric train is travelling south, then which way is the smoke going?

John asked Jack, "The time right now is 7 pm. Can you tell me what will be the time 23, 999, 995 hours later ?"

While Bella does not know the answer, do you ?

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