Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

Find out the missing number in the picture attached:

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

What word is identified by the below rebus?

Your Your Your Your Your
Your Your Your Your Your

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

In a classic wine shop, the list of three most popular wines are:
- The cost of 1 French wine bottle: 500$
- The cost of 1 German wine bottle: 100$
- The cost of 20 Dutch wine bottles: 100$

John entered the wine shop and he needs to buy
- All three types of wine bottles.
- Needs to buy Dutch wine bottles in multiples of 20.
- Need to buy 100 wine bottles in total.

John has only 10000$. How many wine bottles of each type, John must buy?

What is full of holes but still holds water?

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?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

It is always ahead of me yet I can never see it. What is it?