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

Can you place six X (crosses) in below board without making three in a row in any way ?

Remove two matchsticks to make the below equation correct.

Before the start of the car race, John and Jacob have the same amount of fuel in their car. With this fuel, John can drive for 4 hours while Jacob can drive five hours.
After a time they realize that the amount of fuel left in John's car is 1/4th of the fuel in Jacob's.

For how long they are racing?

The picture shows the dice results in each couple of throws. If they are actually following a pattern, can you find out the missing one?

Can you make four (4) nines (9) equal 100?

Our product and our sum always give the same answer. Who are we?

Four men were in a boat on the lake. The boat turns over, and all four men sink to the bottom of the lake, yet not a single man got wet! Why?

There was a competition where the contestants had to hold something. At the end of the event, the winner was a person who had no hands or feet. What was it that the contestants had to hold?

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?