Sequences

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by [email protected] » Fri Mar 18, 2016 9:04 am
Hi Shazi1711,

This sequence question is really just about staying organized and doing some basic arithmetic. We're told that...

1st term = 1
2nd term = 2
3rd term = 3

And every term AFTER the third term follows the following pattern: each term equals "one term back" - "two terms back" + "three terms back"; so...

4th term = 3 - 2 + 1 = 2
5th term = 2 - 3 + 2 = 1
6th term = 1 - 2 + 3 = 2
7th term = 2 - 1 + 2 = 3
8th term = 3 - 2 + 1 = 2
9th term = 2 - 3 + 2 = 1
10th term = 1 - 2 + 3 = 2

Final Answer: C

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