O_er_t_o_

Complete the missing letters of the given word.

I came first on earth but second on the heaven.
I also came twice in a week but found just once in a year.
I stay away from months but you can find me in February.

What am I?

I am white when I am dirty, and black when I am clean. What am I?

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

What demands an answer, but asks no questions

Which Burger Is Different in below image?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

I have a clock(12-hour format) and both the needles of the clock overlap at 12:00.
After how much time, they will overlap again?

John’s parents have three sons: Snap, Crackle, and what’s the name of the third son?

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?