perplexus.info :: Numbers : Y ask about Y ?

Y ask about Y ? (Posted on 2017-04-04)

(i)Y is a positive integer.
(ii) Y-1 is divisible by 5;
(iii) Y is divisible by 2,3,4,6,7,8 and 9.

What is the smallest Y?.

Submitted by Ady TZIDON

Rating: 3.0000 (1 votes)

Solution: (Hide)

The LCM of 2,3,4,6,7,8,9 is 504
The smallest n for which 504*n-1 is a multiple of 5 is n=4.
Answer Y=2016

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

Subject	Author	Date
Explanation to Puzzle Answer	K Sengupta	2022-06-09 00:51:09
Puzzle Answer	K Sengupta	2022-06-09 00:40:57
re(2): Another approach	Brian Smith	2017-04-13 09:22:02
re: Another approach	Ady TZIDON	2017-04-13 01:08:52
Y Y	Steve Herman	2017-04-04 14:26:50
Another approach	Brian Smith	2017-04-04 12:25:42
Better Late Than Never (spoiler)	Steve Herman	2017-04-04 10:35:12

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