What you cannot hold but it is yours?

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

There was a greenhouse.
Inside the greenhouse, there is a white house.
Inside the white house, there is a red house.
Inside the red house, there are lots of babies.

What is It?

Name a key which is hardest to turn.

What does below pictogram mean?

What question can you never answer yes to?

Guess the hidden movie name?

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

If you toss a coin 10 times and it lands heads up every time, what are the chances it will land heads up if you toss it again?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?