John went to meet his friend Jacob, but when he was about to reach the main gate, John notices that Jacob had a mighty dog who was fastened to the tree. The chain is long enough that it allows the dog to reach the main gate.

How can the John reach the main gate?

What is black when you buy it, red when you use it, and gray when you throw it away?

Which English verb becomes past tense just by rearranging the letters?

What has to be broken before you can use it?

Look at the picture and find out which square is not linked with any of the other squares.

What country can make you shiver?

The following four words might seem abrupt to you. But you can make them meaningful by just adding vowels.
RDSH
GGPLNT
TMT
NN

Hint: All of them are vegetables.

What month of the year has 28 days?

How is the moon similar to a dollar?

What is the fastest way to double your money?