Question: Use number theory to explain why we can't make all possible postage over k cents using 6 and 27cent stamps. Use number theory to explain

Use number theory to explain why we can't make all possible postage over k cents using 6 and 27cent stamps. Use number theory to explain why we can make any postage of at least 12 cents using 4 and5 cent stamps. (Hint: consider the division algorithm where d= 4).

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