If air is called green,green is called blue,blue is called sky,sky is called yellow,yellow is called water and water is called pink,then what is the colour of clear sky?

If $PRATAP$ could be given the code number $1618120116$, what code number can be given to $NAVIN$?

If $ROSE$ is coded as $6821$,$CHAIR$ is coded as $73456$ and $PREACH$ is coded as $961473$,what will be the code for $SEARCH$?

If in a certain language,$SPACE$ is coded as $TQBDF$,how will $PURSE$ be coded in that code?

In a certain code,$33946$ is coded as $PPOAL$ and $1987$ is coded as $ROSE$. How is $94678$ coded in that code?

If 'table' is called 'chair','chair' is called 'cupboard','cupboard' is called 'chalk','chalk' is called 'book','book' is called 'duster',and 'duster' is called 'table',what does the teacher use to write on the blackboard?