If diamond is called gold,gold is called silver,silver is called ruby and ruby is called emerald,which is the cheapest jewel?

The word $EXPAND$ has been written in four different codes by applying four different rules. Identify the rule applied to the word $MICROWAVE$ to obtain the code $FXDATXJQV$ from the given alternatives.
$EXPAND$ $(a)$ $FYQBOE$ $(b)$ $EPDTCR$ $(c)$ $GYRBPE$ $(d)$ $CWNZLC$
$MICROWAVE$ : $FXDATXJQV$

The word $EXPAND$ has been written in four different codes by applying four different rules. Identify the rule applied to the word $EARTHQUAKE$ to obtain the code $FBSUIRVBLF$.

If in a certain language $ENTRY$ is coded as $12345$ and $STEADY$ is coded as $931785$,then state which is the correct code for $NEATNESS$.

In a certain code,$FORGE$ is written as $FPTJI$. How is $CULPRIT$ written in that code?

If in a certain language,$TRIANGLE$ is coded as $SQHZMFKD$,which word would be coded as $DWZLOKD$?