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Latest: Same digits II Rating: 4.00
Choose two distinct non-zero digits. Evaluate the sum of the product and the s.o.d. of the pair.

What is the probability that the result is the concatenation of the initially selected digits?

Example: if the digits were 4,7 the resulting 4*7+7+4=39, not the case you were after, i.e. 47 or 74

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