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

Three people check into a hotel. They pay $60 for the rent of the room. After they check-in, the manager realize that the rent for the room is $55. So, he gives $5 to the bellboy and asks him to give it to them. The bellboy thinks that it will be difficult for the three people to share $5 among them and seeking the personal benefit, he pockets $2 and gives the remaining $3 to them.

Now, each person paid $20 and got back $1. In this manner, each of them paid just $19 which totals to the amount of $57. The bellboy has $2 with him and adding them, we get $59. So where is the remaining $1?

If an electric train is travelling south, then which way is the smoke going?

There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box?

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

What word is identified by the below rebus?

Your Your Your Your Your
Your Your Your Your Your

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

A man died, leaving $10,000,000 for his widow, 5 sons and 4 daughters. Each daughter received an equal amount, each son received twice as much as a daughter, and the widow received three times as much as a son.

How much did the widow receive?

If Rajina's daughter is my daughter's mom, who am I to Rajina?

I have one of the three numbers: 1, 2, or 3 in my mind. I speak only truth. You can ask me just one question for which I will only reply in yes or no or don't know. What question will you ask from me so that you are able to know the number?