You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. 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?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

My first is in chocolate but not in ham. My second is in cake and also in jam. My third at tea time is easily found. Altogether, this is a friend who is often around. What is it?

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

A letter is hidden in the image in plain sight. Can you spot it in 6 seconds? Test your eye power now!

A man calls his dog from the opposite side of a river. The dog crosses the river without a bridge or a boat and manages to not get wet. How is this possible?

Twice ten are six of us,

Six are but three of us,

Nine are but four of us;

What can we possibly be?

Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

What you cannot hold but it is yours?