Explanation
The given series is: 7, 10, 8, 11, 9, 12, ...
To identify the pattern and predict the next number in the series, we need to look for any relationships or rules that govern the sequence. In this case, we can see that the sequence seems to alternate between adding 3 and subtracting 2 from each term.
Starting with the first term, 7, we add 3 to get the second term, 10. Then, we subtract 2 from the second term to get the third term, 8. Next, we add 3 to get the fourth term, 11. We then subtract 2 from the fourth term to get the fifth term, 9. Finally, we add 3 to get the sixth term, 12.
So, following the pattern, we would subtract 2 from the sixth term to get the seventh term. Thus, the next number in the series would be 12 - 2 = 10.
Therefore, the correct answer is B: 10.
