Find the last number in the series below:

voN luJ yaM raM ---

A large container is kept in open under the rain. Every passing hour, the water collected inside the container becomes double what it was.

In ten hours, the container is filled completely. Can you calculate how long would it have taken to be filled in half?

John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

What do you see in the given picture?

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?

In case you were starting to feel confident, this one was meant for third graders in Vietnam. The answer is 66, but we don't blame you for scratching your head about how they got there.

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

What always comes into a house through the keyhole?

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