Sequences re-submission

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pinkee | 22:23 Fri 13th Jul 2012 | Quizzes & Puzzles
6 Answers

I am tring to find the next number in the following two sets of numbers:

4.7, 11.4, 18.1 ? This is arithmetic

36, 12, 4 ? This is Geometric



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Thank you both. Any ideas for number 2?
Um pinkee I think they have given you an answer - 1.3333?
yes, that's the 1.3333333333333333

* in an arithmetic sequence to obtain the next entry you add/subtract a fixed amount to current entry, in this case add 6.4
* in a geometric sequence you multiply/divide the current entry by a fixed amount to get the next one, in this case divide by 3

(subtraction is the same as addition but using a negative number, and similarly division is equivalent to multiplication)
(that should be 6.7 for the addition)

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Sequences re-submission

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