If $HEATER$ is written as $KBDQHO$,how will you encode $COOLER$?

In a certain code,'$467$' means 'leaves are green','$485$' means 'green is good' and '$639$' means 'they are playing'. Which digit stands for 'leaves' in that code?

If $ROBUST$ is coded as $QNATRS$ in a certain language,which word would be coded as $ZXCMP$?

The word $EXPAND$ is written in four different codes. Identify the rule applied to the word $CONSULATE$ to obtain the code $FVDPZYUWL$ from the given options.
$EXPAND$: $(a)$ $FYQBOE$ $(b)$ $EPDTCR$ $(c)$ $GYRBPE$ $(d)$ $CWNZLC$
$CONSULATE$: $FVDPZYUWL$

In a certain code language:
$(A)$ 'pit na som' means 'bring me water'
$(B)$ 'na jo tod' means 'water is life'
$(C)$ 'tub od pit' means 'give me toy'
$(D)$ 'jo lin hot' means 'life and death'
To find out the answer to the above question (which is implied to be decoding the language),which of the following statements can be dispensed with?

If in a certain language $MISTAKE$ is coded as $9765412$ and $NAKED$ is coded as $84123$,then state which is the correct code for $ASSIST$?