If you have two coins that equal 25 cents and one coin is not a nickel what two coins do you have?

This seems to be a variation of the brain teaser about having 30 cents and one is not a nickel - but the other is. If the question is what two coins equal 25 cents, the answer could be "two bits". In colonial times, each bit was worth an eight of a dollar, so two bits was 25 cents. You may recognize the reference to bits in the phrase "shave and a haircut, two bits".

In older coins, a 20-cent piece and a half-dime (5 cents).

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Similarly, in pence coins, a 20 cent piece and a 5 cent piece.