In which direction should the missing arrow point?

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

Five lovely ladies(Sophia, Isabella, Madison, Emma and Olivia) planned a picnic.

They each buy one thing each for the picnic.

Sophia, Emma and Olivia got a drink : orange-Juice, apple-juice, and mango-juice.
Olivia got the drink with the same letter as the one in her first name.
Emma loves mango-juice.
The other two bring some food : chocolates and pizza.
Also Madison is allergic to cheese.

So which ladies bought what ?

What has many keys but can’t open a single lock?

There is a certain crime, that if it is attempted, is punishable, but if it is committed, is not punishable. What is the crime?

Can you identify the hidden rebus in the image below?

I was speeding and ran through a stop sign, yet two traffic officers who were there do nothing about it.

why?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

What is the longest word in the dictionary?

A boy purchased a book from a bookkeeper and gave him $100.
The cost of the book is $50 but the bookkeeper has no change, so he gets the change from the next shop and returns the boy his $50.

After some time the next shopkeeper came with the $100 note and told the bookkeeper that the note was a fraud, so he took the money back.

How much loss did the bookkeeper face?