Guest Posted February 16, 2008 Report Share Posted February 16, 2008 What next? 1 , 2 , 4 , 13 , 31 , 112 ? Quote Link to comment Share on other sites More sharing options...
0 bonanova Posted February 18, 2008 Report Share Posted February 18, 2008 The base-10 sequence 1, 2, 4, 8, 16, 32, 64, 128, ... written in base 5 is 1, 2, 4, 13, 31, 112, 224, 1003, .... This might be an even trickier riddle if you include the 224 term and ask for the 1003 term. Quote Link to comment Share on other sites More sharing options...
0 Guest Posted February 18, 2008 Report Share Posted February 18, 2008 The base-10 sequence 1, 2, 4, 8, 16, 32, 64, 128, ... written in base 5 is 1, 2, 4, 13, 31, 112, 224, 1003, .... This might be an even trickier riddle if you include the 224 term and ask for the 1003 term. I agree my solution is not so elegant .. but how about .. 418 if we design a floor function [y] as: [y] = 0.4667x^5 - 7.1667x^4 + 42.333x^3 - 116.33x^2 + 146.7x - 65 Then y satisfies all the numbers for x= 1 to 6 and then for x=7 => y=418 But I totally agree that Bonanova's solution is way elegant than mine Quote Link to comment Share on other sites More sharing options...
0 Guest Posted February 18, 2008 Report Share Posted February 18, 2008 thnanx for such a nice solution i am impressed Quote Link to comment Share on other sites More sharing options...
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1 , 2 , 4 , 13 , 31 , 112 ?
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