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2 August, 08:43

1,3,6,10,15,21,28,36,45,55,66,78

Describe the pattern shown above

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  1. 2 August, 08:55
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    The nth term is the [ (n-1) th term + n ].
  2. 2 August, 10:33
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    1+2=3

    3+3=6

    6+4=10

    10+5=15

    So on ...

    When increasing in numbers, it adds 1 more than the last.
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