You need to arrange three 7 and mathematical symbols to form number 1?

Jigsaw captured 100 people and make them stand in a circle and all these people are labelled as Person1, Person2, Person3... Person100. He made them play a crazy game in which Person 1 shot Person 2 and pass the gun to the next person and so on until one stands alive.

Which person will survive in the end?

Can you find the missing piece of the Porsche?

A girl is twice as old as her brother and half as old as her father. In 50 years, her brother will be half as old as his father. How old is the daughter now?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

A man is walking down a road with a basket of eggs. As he
is walking he meets someone who buys one-half of his eggs
plus one-half of an egg.
He walks a little further and meets another person who buys
one-half of his eggs plus one-half of an egg.
After proceeding further he meets another person who buys
one-half of his eggs plus one half an egg. At this point, he
has sold all of his eggs, and he never broke an egg.
How many eggs did the man have to start with?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?