perplexus.info :: Numbers : Lucía's Odd Product

Lucía's Odd Product (Posted on 2024-05-24)

Lucía multiplies some positive one-digit numbers (not necessarily distinct) and obtains a number n greater than 10. Then, she multiplies all the digits of n and obtains an odd number. Find all possible values of the units digit of n.

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Subject	Author	Date
Puzzle Thoughts	K Sengupta	2024-05-29 00:28:58
Conjecture	Jer	2024-05-24 09:43:00
Computer exploration without proof	Larry	2024-05-24 09:20:55

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