Which of the following words don't belong in the group and why?
CORSET, COSTER, SECTOR, ESCORT, COURTS

In the picture, you can see a chess board. On the top left position, the K marks a knight. Now, can you move the knight in a manner that after 63 moves, the knight has been placed at all the squares exactly once excluding the starting square?

Three friends decide to distribute the soda cans they had among them. When all of them had drunk four cans each, the total number of cans that remained was equal to the cans each one of them had after they had divided the cans.

Can you calculate the total number of cans before distribution?

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

Find the hidden panda in the image below.

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

Which is heavier: a ton of bricks or a ton of feathers?

Solve the puzzle by telling what does below picture means.

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