What happened when the wheel was invented?

A man is found dead in his bathroom naked with blood scattered all around him. The bathroom was locked from the inside and there is no trace of any struggle. There is nothing in the bathroom except his pant with the belt still around and his shirt. Also, the medic team can't find any incision in his body that may have been the reason behind so much blood loss.

The Police department is clueless regarding this murder mystery.
Can you?

John, a 5-year-old boy, was really fond of the chocolates. He asked his Mother to give him some money to buy his favourite chocolates. His Mother gave him $45. He went to the shopkeeper and asked, "How much is one chocolate for?". The shopkeeper said $3 for one chocolate. Also, if you give me the wrappers of three chocolates, I will give you one for the exchange.
In total, how much chocolate could John eat?

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

Who am I?

A Child was born in Lahore, Pakistan.

Still child is not a Pakistani citizen.why ?

I look at you, you look at me I raise my right, you raise your left. What am I?

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?

What does this below rebus puzzle mean?

What is the end of everything?

How many bricks does it take to complete a building that is 15 feet wide, 30 feet deep, and 12 feet tall made of brick?