Henry Ernest Dudeney/Puzzles and Curious Problems/87 - Reversing the Digits
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Puzzles and Curious Problems by Henry Ernest Dudeney: $87$
- Reversing the Digits
- What $9$-digit number, when multiplied by $123\, 456 \, 789$, gives a product ending in $987 \, 654 \, 321$?
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Sources
- 1932: Henry Ernest Dudeney: Puzzles and Curious Problems ... (previous) ... (next): Arithmetical and Algebraical Problems: Digital Puzzles: $87$. -- Reversing the Digits
- 1968: Henry Ernest Dudeney: 536 Puzzles & Curious Problems ... (previous) ... (next): Arithmetical and Algebraical Problems: Digital Puzzles: $124$. Reversing the Digits