1. 03-06-12 09:55 PM #1
    playersonly69
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    Have a math question for you guys

    What is the rule for the pattern below


    3,8,23,___
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  2. 03-06-12 09:59 PM #2
    PickWinnerAllDay
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    dunno but the next number is 48
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  3. 03-06-12 10:03 PM #3
    rm18
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    68 will be my goal if you bout it girl lets roll
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  4. 03-06-12 10:04 PM #4
    RudyRuetigger
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    my guess is 68

    not enough info though

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  5. 03-06-12 10:04 PM #5
    PickWinnerAllDay
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    There is no pattern b/c it could be 48 or 68.
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  6. 03-06-12 10:06 PM #6
    jeffdane
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    68 def
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  7. 03-06-12 10:07 PM #7
    The Kraken
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    I'd lean 68 over 48 but not sure what the rule is.
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  8. 03-06-12 10:11 PM #8
    RudyRuetigger
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    3 * the next number - 1
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  9. 03-06-12 10:15 PM #9
    playersonly69
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    I knew that 68 was probably it, but wasnt sure. This was for my 5th grade daughters GT class homework by the way
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  10. 03-06-12 10:16 PM #10
    warriorfan707
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    3x -1

    obv
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  11. 03-06-12 10:30 PM #11
    InTheDrink
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    Quote Originally Posted by RudyRuetigger View Post
    3 * the next number - 1
    could just as easily be 183 = multiply last 2 numbers in the sequence - 1

    not enough info to say for sure
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  12. 03-06-12 10:39 PM #12
    Full Time Hobo
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    3x-1 is the pattern.

    I don't know what the 'rule' is though.
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  13. 03-06-12 10:40 PM #13
    trytrytry
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    these 3x patterns are easy to see...
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  14. 03-06-12 11:07 PM #14
    sweethook
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    even
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  15. 03-06-12 11:17 PM #15
    ttwarrior1
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    28.......

    13 and 18 are before, 28 after
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  16. 03-06-12 11:17 PM #16
    Gee
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    I googled the numbers. I don't actually understand the explanation and think 3x -1 is easier (and gives the same answer), but its clearly what they are looking for:

    12. This sequence consists out of two alternating series.
    3 8 23 68 203 608

    1. The first series shows the relation between the 1st and 3rd number, 3rd and 5th etc. in this case this following relation exists: 23-3=20 203-23=180.
      This difference is a multiple of each other by a factor of 180/20=9.
    2. The second series shows the relation between the 2nd and 4th number, the 4th and 6th etc. in this case 68-8=60. Finding the next number in the sequence means using the relation from the first series.
    3. This means that 60 must be multiplied by 9, resulting in 540. This number is added to 68 which results in 608 as next number in the sequence.


    http://www.fibonicci.com/numeracy/nu...t/explanation/
    Last edited by Gee; 03-06-12 at 11:22 PM.
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  17. 03-06-12 11:26 PM #17
    wantitall4moi
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    If it is for a 5th grader I would suspect the 'correct' answer will be 48.

    Especially if they know everyone will google it and get the answer above.
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