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-   -   Sentence sequences (https://www.askmehelpdesk.com/showthread.php?t=396179)

  • Sep 13, 2009, 07:30 PM
    krystal94
    Sentence sequences
    Can anyone please help me figure out the next three terms or the rules for any of the following sequences?

    1) 1/2, 1/2, 3/8, 1/4, 5/32

    2)-2, -3/2, -6/5, -1.5, -6/7

    3) -6, -2, 0, 1, 3/2

    4) -6, -3, -2, -3/2, -6/5
  • Sep 14, 2009, 07:37 AM
    ebaines

    I'll give you some hints:

    1) If you rewrite the second number as 2/4, and the fourth as 4/16, you have the series:

    1/2, 2/4, 3/8, 4/16, 5/32...

    Do you see the patterns in the numerator and denominator?

    2) Please clarify - is the fourth term really supposed to be -1.5, or is that a typo? If it's really supposed to be -1, then you have the same pattern as in sequence number 4 (see below).

    3) Look at the differences between each pair of numbers - there's a definite pattern there.

    4) Consider how much you would have to multiply each term to get the next. Note - if sequence 2 has a typo in it (which I believe it does), then you can get your answer from sequence 2.
  • Sep 14, 2009, 03:23 PM
    krystal94

    1) Ok, so in the first sequence the next three terms would be 6/64, 7/128, 8/256?

    2) The fourth term in the second sequence is -1 1/2.

    3) Is the next three terms in the third sequence 2 1/4, 2 5/8, 2 13/16?

    4) In sequence four I've got
    -6(1/2)=-3(2/3)=-2(3/4) but I can't seem to figure out what to multiply by next to get -6/5? I must be missing something?
  • Sep 15, 2009, 10:37 AM
    Unknown008

    1) Yes

    2) If that is so, I find it like this:

    1. multiply by 4/3
    2. multiply by 5/4
    3.multiply by 4/5
    4. multiply by 7/4

    I believe that the next one is obtained by multiplying the last term by 4/7. Then, 4/9, then 9/4.

    3. Nope, try again for that one. (+4, +2, +1, +0.5, +0.25, +0.125, etc)

    4. It's firstly multiplied by 1/2, then 2/3, then 3/4, then 4/5. Can you do it now?

    Hope it helped! :)
  • Sep 15, 2009, 02:06 PM
    krystal94
    All right I think I've it now. I appreciate the help. Thanks! :)
  • Sep 16, 2009, 07:30 AM
    Unknown008

    You're welcome!

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