perplexus.info :: Numbers : Lynch-Bell numbers

Lynch-Bell numbers (Posted on 2023-01-27)

L-B number is a number with distinct non-zero digits divisible by each of its digits e.g. 186432.

a. What is the largest LBN not containing the digit 1?
b. How many LBNs contain the digit 4?
c. Same for digit 5.
d. What is the largest LBN?

Provide your reasoning and/or program; solution by searching for answers on the web will be considered unfair…

Submitted by Ady TZIDON

Rating: 5.0000 (1 votes)

Solution: (Hide)

The 1st 4 lines of Larry’s comment contain full answers re a,b,c, & d. Charlie provided an unsolicited info re total number of LBNs. More interesting facts can be found @ OEIS A115569.

Comments: ( You must be logged in to post comments.)

Subject	Author	Date
re: Also answered, how many there are	sarrakhanb	2023-01-29 02:18:43
Also answered, how many there are	Charlie	2023-01-27 10:35:09
Solution	Larry	2023-01-27 08:30:55

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