You need to arrange three 7 and mathematical symbols to form number 1?

You need to climb ten stairs. At every stair, you can either take one step up or you can jump two steps up.

In how many different ways you can climb 10 stairs?

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

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

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

I am lying and I always lie. Tell me whether I am lying or telling the truth.

There are three boxes. One is labeled "APPLES" another is labeled "ORANGES". The last one is labeled "APPLES AND ORANGES". You know that each is labeled incorrectly. You may ask me to pick one fruit from one box which you choose.

How can you label the boxes correctly?

Today, I celebrated my 32nd birthday but I was born in 1972.
How is this possible?

In front of you, there are 9 coins. They all look absolutely identical, but one of the coins is fake. However, you know that the fake coin is lighter than the rest, and in front of you is a balance scale. What is the least number of weightings you can use to find the counterfeit coin?

If two's company, and three's a crowd, then whats four and five ?