perplexus.info :: Just Math : Fortieth logs

Fortieth logs (Posted on 2011-05-31)

It turns out that the common logarithms of each of the numbers from 2 through 9 can be very well approximated by rational numbers of the form n/40.

Derive each of the numerators with no calculation aids beyond pencil and paper.

See The Solution Submitted by Jer

Rating: 4.5000 (2 votes)

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

Subject	Author	Date
re(3): Who is right for 7?....DETAILS	Ady TZIDON	2011-06-02 11:43:53
re(2): Who is right for 7?....DETAILS	Gamer	2011-06-02 05:11:42
re(2): Closer number, closing remarks	Ady TZIDON	2011-06-02 01:59:01
re: Closer number	Steve Herman	2011-06-02 00:42:38
re(2): Who is right for 7?	Ady TZIDON	2011-06-01 20:39:15
re: Who is right for 7?....DETAILS	Ady TZIDON	2011-06-01 19:23:47
Answers from 2 to 9	Math Man	2011-06-01 19:05:31
Closer number	Math Man	2011-06-01 19:01:51
re: Who is right for 7?	JayDeeKay	2011-06-01 18:41:41
Who is right for 7?	Jer	2011-06-01 15:08:08
Lucky 7	Steve Herman	2011-05-31 21:13:59
No Subject	JayDeeKay	2011-05-31 17:57:15
re(2): A start (spoiler)	Jer	2011-05-31 17:06:27
re: A start (spoiler)	Charlie	2011-05-31 14:43:51
A start (spoiler)	Steve Herman	2011-05-31 14:12:29

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