No, the answer is not 9 cents. The difference between an old penny and a new dime is that an old penny is a one-penny coin of the type which was minted before 1967 and in circulation before 1971, and a new dime is a recently-minted 10 cent coin. The former is a large bronze coin, and the latter is a small aluminium one. In terms of value, it is less than 9 cents because a penny is now (and was then, at the then exchange rate) worth more than a cent. The questionner is therefore not only illogical (by asking a question to which he/she supposedly already knows the answer, but is insane (in giving the wrong answer to his/her own question.