Meet Donny Notrump

Logic Level 1

[Standard American coins come in four denominations. Pennies are worth 1 cent, nickels 5 cents, dimes 10 cents and quarters 25 cents.]

Neighborhood boy Donny Notrump, resident of Cleveland, Ohio, precocious 10-year old logician, mathematician-in-training and expert bridge player, comes over to you holding something in his left fist.

"I have two coins in my fist," he proclaims. "They have a total value of 30 cents. One of them is not a quarter."

Is it possible that Donny is telling the truth?


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