After 19 days and 55 rule guesses, the sequence challenge was SOLVED on Saturday morning.
The not-so-fabulous mystery prize will be revealed tomorrow. The image is a clue to its identity.
UPDATE: The mystery prize is now revealed at the bottom of the solution page.
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Continue reading
OK, so today I’m unveiling a new maths puzzle that, all being well, will run every day until someone discovers the solution. There is even a (very modest) ‘mystery prize’, which I will send to the winner (provided that they do not live somewhere so remote that the postage charges would be ridiculous).
The puzzle is a simple sequence, to which one term will be added each day. Your challenge is simply to determine the mathematical rule behind the sequence.
Click here to see the sequence
I am not really sure how difficult this will be (quite challenging, I think), so we could be here for a long, long time… or equally, it could all be over in a couple of days. Or maybe there will be no guesses at all and we will have to quietly forget all about it. Whichever, it’s all good.
For a mini-puzzle, scroll down to the bottom of this post…
A NEW SEQUENCE FOR THE OEIS!
Inspired by all that 82000 business (see HERE, HERE and HERE), I recently created another sequence centred on the idea of expressing numbers in different bases. Continue reading
The 82000 sequence is still generating interest.
Here’s a great Numberphile video about the sequence from mathematician James Grime:
[youtube http://www.youtube.com/watch?v=LNS1fabDkeA]
The sequence has also made it into the Online Encyclopaedia of Integer Sequences, as A258107!
I have also found an early mention of the special properties of 82000, in this exchange on a French puzzle forum, from October 2008. Continue reading
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The 82000 sequence that I posted the other day seems to have caught the imagination in a few quarters. Continue reading
Click HERE for the solution.
Feel free to have a guess via the comments. I will give the answer next week.
This is not a trick question; the sequence is based on a genuine mathematical rule. A word of warning though, although it does not require any complex mathematical knowledge the solution is pretty obscure.
SOLUTION NOW AVAILABLE: CLICK HERE
