Henry Ernest Dudeney/536 Puzzles & Curious Problems/102 - An Exceptional Number/Historical Note
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Historical Note on 536 Puzzles & Curious Problems by Henry Ernest Dudeney: $102$ -An Exceptional Number
Martin Gardner includes this variant on $51$ - An Exceptional Number from Dudeney's Modern Puzzles as an aside in the Answers section of his $1968$ repackaging 536 Puzzles & Curious Problems.
He attributes its discovery to Victor Meally.
Sources
- 1968: Henry Ernest Dudeney: 536 Puzzles & Curious Problems ... (previous) ... (next): Answers: $102$. An Exceptional Number