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

How many sides does a circle have?

While going to your grandmother's house, you counted Twenty houses on the right side. While returning back to your home, you counted Twenty houses on the left side.

How many houses are there between your home and your grandmother's home?

What month of the year has 28 days?

What word begins and ends with an E, but has only one letter?

Begin with a word, five letters to my name,
Remove the first and last but I am the same
Take out my middle and still, I remain.
What word am I?

O_er_t_o_

Complete the missing letters of the given word.

What has many keys but can’t open a single lock?

Pronounced as one letter,
And written with three,
Two letters there are,
And two only in me.
I am double, I am single,
I am black blue and grey,
I am read from both ends,
And the same either way.

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?