Buy me, smell me or deliver me, I do not change.

Who am I?

Why do you find that most of the buildings are deprived of the 13th floor?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

How far can you walk into the woods?

If one and a half boys, eat one and a half burgers in one and a half hours.

How many burgers can 9 boys eat in 3 hours?

What is the difference between a jeweller and a jailer?

In case you were starting to feel confident, this one was meant for third graders in Vietnam. The answer is 66, but we don't blame you for scratching your head about how they got there.

I am a five-letter word and people eat me. If you remove the first letter I become an energy form. If you remove the first two letters, I am needed to live. Scramble the last three letters and I am a drink. What word am I?

Can you move 2 matchsticks to form four equal sized squares.