What always comes into a house through the keyhole?

You can see three almost identical images below. Can you spot the odd one out from them?

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

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

Why is it against the law for a man living in Delhi to be buried in Mumbai?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

Christina makes tasty toast in a small pan. After toasting one side of a slice, she turns it over. Each side takes 30 seconds. The pan can only hold two slices.
How can she toast both sides of three slices in 1 & 1/2 instead of 2 minutes?

Two old friends, Jack and Bill, meet after a long time.

Three kids
Jack: Hey, how are you, man?
Bill: Not bad, got married and I have three kids now.
Jack: That's awesome. How old are they?
Bill: The product of their ages is 72 and the sum of their ages is the same as your birth date.
Jack: Cool..But I still don't know.
Bill: My eldest kid just started taking piano lessons.
Jack: Oh, now I get it.

How old are Bill's kids?

What number when divided in half becomes zero?

A wooden log balances equally on the scales when weighed with three-quarters of a pound and three-quarters of a wooden log.

Can you calculate the weight of the entire wooden log?