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Double headed novelty and Magician's coins have no numismatic value, but depending on the denomination an quality most are under $10.00.
The two coins are 10c and 25c. As stated in the question, one of them is not a quarter, if it's a leap year.
Unless it's a genuine mistake that occurred in the mint, it's probably worth a few bucks at most. Two-headed quarters are often sold in magic and gag gift shops. See the Related Links for more info about these coins.
there are 3 months in quarter of a year
No, it's not possible that a double-headed quarter with two such diverse dates could be a legitimate Mint error. Dies are destroyed, if not worn out through usage, by the end of the year in which they are used. The coin in question is almost certainly a novelty or magician's coin.