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Posted by on Wednesday, September 29, 2010 at 10:20am.

describe how each sequence is generated and write down the next two terms:
a) 40 41 43 46 50 55
b)90 89 87 84 80 75
c)1 3 7 13 21 31
d) 2 6 12 20 30 42

PLEASE HELP its urgent!

  • MATHS! URGENT! - , Wednesday, September 29, 2010 at 10:28am

    Even I can see what's happening with the first one:

    add 1, then add 2, then add 3, then add 4, etc.

    Turn your imagination loose and see what you find. These are not difficult.

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