You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

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

I cry without having a voice.
I fly without having wings.
I bite without having teeth.
I whisper without a mouth.

Who am I?

For an extra income, John decided to work at a Hotel for one hour daily. The manager offers him that they will pay him $11 after every 11 days.
However, John offered a different proposition to the manager. The offers stand as:
He will be paid just a penny on his first day.
Two pence will be paid on the second day,
Four pence will be paid on the third day.
And so on till the 11th day.

Should the Hotel manager accept his offer?

There is a jar in which there are two types of candies.
20 blueberries and 16 strawberries. You perform the following steps:
1) You take out two candies.
2) If the two candies are of the same flavour, you add a blueberry one otherwise, you add the strawberry one.

You repeat these two steps till there is just one candy remaining in the jar. Which flavoured candy will be left?

What four weights can be used to balance from 1 to 30 pounds?

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

What occurs twice in a week, once in a year but never in a day?

It is raining today at 11:59 am. What is the probability of sunny weather after 72 hours?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?