perplexus.info :: Just Math : a) is easy, b) is not

a) is easy, b) is not (Posted on 2011-02-18)

1, 2, 4, 8, 1, 3, 6, 1 ... is a non-cyclic series where a(n) represents the leading digit of 2^n.

a) How many ones are there within the first 3000 members?
b) Same question for a digit d, other than digit one.

No Solution Yet Submitted by Ady TZIDON

Rating: 3.0000 (2 votes)

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

Subject	Author	Date
My error - why we disagree on part 1	Jer	2011-02-19 17:57:58
Not an approximation?	Steve Herman	2011-02-19 15:47:20
re: Old-fogey logic (spoiler)	broll	2011-02-19 02:43:29
2 computer ways	Charlie	2011-02-18 18:39:55
solution to b from OEIS	xdog	2011-02-18 17:54:39
Why a) is easy...	Jer	2011-02-18 16:51:57
Old-fogey logic (spoiler)	Steve Herman	2011-02-18 14:00:31
approximation (spoiler)	Steve Herman	2011-02-18 13:37:33

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