With (say) half a dozen sets of data + the target value, it might be possible to exclude some of the numbers thereby reducing the search space.

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
Lingua non convalesco, consenesco et abolesco. -- Rule 1 has a caveat! -- Who broke the cabal?
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

In reply to Re^3: Reverse engineering a formula... by BrowserUk
in thread Reverse engineering a formula... by devnul

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