neildgrantsilkyg12 neildgrantsilkyg12

15-01-2018
Mathematics

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next number in sequence 3 -6 12 4 20 ?

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mathstudent55 mathstudent55

15-01-2018

-6 - 3 = -9
12 - (-6) = 18
4 - 12 = -8
20 - 4 = 16
The first difference is -9. The third difference is -8.
Maybe the fifth difference is -7.
That makes the next term 13.

3, -6, 12, 4, 20, 13

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