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

Which number should replace the question mark?

If your uncle’s sister is not your aunt, what relation is she to you?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

Can you Find and name the hidden bird in the picture below ?

Can you replace the question mark with the correct number in the below table sequence?

A man hijacks an aeroplane transporting both passengers(8 of them) and valuable cargo. After taking the cargo, the man demands nine parachutes, puts one of them on, and jumps, leaving the other eight behind. Why did he want eight?

What does the below rebus riddle means?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

What is the next number in this series?

4,12,84,3612....