Can you find a relation between the given figures? And find the missing number?

Can you find the connection between the numbers and then find the missing number in the given table?

If we tell you that there is a relation between the numbers and letters in the given figure, can you analyze it and find the missing letter in the last box?

If the figures having some characters given below follow the same rule, then find the missing number from the options?

Can you find out the "friendship like" relation between the two even numbers 284 and 220? It is an exceptional type of relation and enjoyable too.