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Challenge of the Month


Two Numbers

Someone thinks of two numbers between 2 and 99 inclusive.
He then adds them up and whispers the sum to Mr. Sum.
He also multiplies them together and whispers the product to Mr. Product.

The following conversation then ensues.

Mr Product: I don't know what the two original numbers were.
Mr Sum: I already knew that you didn't know.
Mr Product: Well now I know.
Mr Sum: Aha! So do I.

What were the original two numbers?


(Thanks to Ed Severn for this problem.)


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Last Updated: Wednesday, January 6, 2010