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

Can You Find the Missing Zero? A Number Puzzle that Will Trick Your Eyes

I was born in a small house and I live in it all alone. No windows and no doors have been assigned to my house. The only way I can go out is by breaking through the walls of my house.

Who am I?

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

In a supermarket, there is an intelligent glass pane before a refrigerating unit. This glass pane allows cherries and apples through it but does not allow grapes and Orange to pass through it.

Can you identify the rule that the glass pane is following?

Can you name some countries which do not have the alphabet 'A' in them?

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

You have two hour glasses one measures 7 minutes and the other measures 4 minutes.
Using these two-hour glasses, you need to measure exactly 9 minutes.

How come?

In a contest, four fruits (an apple, a banana, an orange, and a pear) have been placed in four closed boxes (one fruit per box). People may guess which fruit is in which box. 123 people participate in the contest. When the boxes are opened, it turns out that 43 people have guessed none of the fruits correctly, 39 people have guessed one fruit correctly, and 31 people have guessed two fruits correctly.
How many people have guessed three fruits correctly, and how many people have guessed four fruits correctly

Find the number of squares in the below-given picture.