Look at this series: 7, 10, 8, 11, 9, 12, … What number should come next? A. 7 B. 10 C. 12 D. 13 Answer Workspace Report Discuss Answer with explanation Answer: Option B Explanation This is a simple alternating addition and subtraction series. In the first pattern, 3 is added; In the second pattern, 2 is subtracted. Rule =(1st number) (1st number + 3 = 2nd number) (2nd number – 2 = 3rd number) (3rd number + 3 = 4th number) Now (7) (7 + 3 = 10) (10 – 2 = 8) (8 + 3 = 11) (11 – 2 = 9) (9 + 3 = 12) (12 – 2 = 10)… So the answer is b = 10. Workspace
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