If the word 'CAT' is coded as 3120, what is the code for 'DOG'?

A. 4157

In a certain code, 'FISH' is coded as 6148. What is the code for 'BIRD'?

A. 2918

In a mixed letter coding system, if the word 'CAT' is coded as 'XZY', and 'DOG' is coded as 'ABC', what is the code for 'AT' if 'A' is coded as 'X' and 'T' is coded as 'Y'?

A. XY

In a mixed letter coding system, if 'CAT' is coded as 'DHW', what is the code for 'DOG'?

B. EQL

If 'HOUSE' is coded as 'IPVTF' and 'CLOUD' is coded as 'DMVPE', what is the code for 'SKY'?

A. TLZ