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number progression puzzle

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arrymong | 20:56 Fri 05th May 2006 | Quizzes & Puzzles
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please help i'm stuck!! what is the next number and why


1,4,13,25,49,?

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Avatar Image issy

arrymong,


Are you sure that the 13 is correct? If it was 9 then the next number would be 121 being the next square of a prime number

21:30 Fri 05th May 2006
Avatar Image mkt
issy thats the theory i was working on...when it didn't work out i started to come up with all manner of weird combos...not that any of them straightened out in the end. im hoping the '13' is wrong now just so it doesnt drive me insane!
21:36 Fri 05th May 2006
Avatar Image issy

arrymong, don't know if this helps


3*1+1 = 4


3*4+1 = 13


3*8+1 = 25


3*16+1 = 49


Then 3*32+1 = 97

22:09 Fri 05th May 2006
Avatar Image issy

arrymong,


My last response misses out 3*2+1 = 7 which is missing from what would be a pure sequence.


It's done my head in so going out for a pint.

22:15 Fri 05th May 2006

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