Can you find out which options fits best with the missing column?

Can you find the key in the picture below?

Below the four parts have been reorganised. The four partitions are exactly the same in both arrangements. Why is there a hole?

When can we add 2 to 11 and get 1 as the correct answer?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

John was running from 40 thieves. John has got 3 gold boxes which weigh as 4kg, 2kg, and 1kg respectively. A witty man asked John to stay with him for seven days in exchange for 1kg gold per day. John needs to stay there for seven days and also do not want to give the witty man any advance. How can John pay for his seven days stay?

What is the riddle which can be asked all day with a different correct answer each time.

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

Decode this picture on T-Shirt and tell what it says ?

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?