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: ( Back to comment list | You must be logged in to post comments.)

re: Old-fogey logic (spoiler)

| Comment 6 of 8 |

(In reply to Old-fogey logic (spoiler) by Steve Herman)

Another notch for old-fogey logic, well done!

Posted by broll on 2011-02-19 02:43:29

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