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Question Number 73847 by mr W last updated on 16/Nov/19

Commented by mr W last updated on 16/Nov/19

$$repostofanoldquestionwhichis$$$$alreadydeleted.$$

Commented by JDamian last updated on 16/Nov/19

$$\mathrm{I}\mathrm{find}\mathrm{it}\mathrm{confusing}\mathrm{because}\mathrm{of}\mathrm{the}\mathrm{overuse}$$$$\mathrm{of}\mathrm{the}\mathrm{word}\mathbf{number}$$

Commented by mr W last updated on 16/Nov/19

$$butwecanunderstandwhatismeant.$$

Commented by mr W last updated on 16/Nov/19

$$A=numbersinwhicheachdigitoccurs$$$$twice$$$$B=numberscontaining4digits$$$$C=numbers,thesumofwhosedigits$$$$is8$$

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