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Thread: What could be the next number in the following sequence?

  1. #1
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    Sep 2007
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    Default What could be the next number in the following sequence?

    3, 4, 7, 12, 19

  2. #2
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    28:
    the differences between consecutive pairs of terms(a2-a1, a3-a2 etc ) aere:
    1,3,5,7.
    the next difference is 9, os the desired next number=19+9=28. ANS.

  3. #3
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    28
    why

    4-3=1
    7-4=3
    12-7=5
    19-12=7
    therefore
    x-19=9
    x=19+9
    x=28

  4. #4
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    28; differences are successive odd integers.

  5. #5
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    28, 39, 52, 65, ...

    t0 = 3
    t1 = t0 + 1 = 4
    t2 = t1 + 3 = 7
    t3 = t2 + 5 = 12
    t4 = t3 + 7 = 19
    t5 = t4 + 9 = 28

    tn = 3 + (2n -1)

    hope that helps

  6. #6
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    3+4 = 7
    4+7+1 = 12
    7+12 = 19
    12+19+1 = 32

  7. #7
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    28
    You add 1, then 3, then 5....

  8. #8
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    Jan 2008
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    i don't get it
    It's too hard ;(

  9. #9

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    Hello
    ans is
    1)3+0=3
    2)3+1=4
    3)4+3=7
    4)7+5=12
    5)12+7=19
    6)19+9=28
    7)28+11=39
    this sequence of the line

  10. #10
    Join Date
    Oct 2014
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    dilshad garden, delhi
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    Answer of this question is 3+0=3
    3+1=4
    4+3=7
    7+5=12
    12+7=19
    19+9=28
    28+11=39
    This is the right answer.

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