Complete the series: 6, 9, 21, 33, 48:

Complete the series: 6, 9, 21, 33, 48:
Answer: 66

The question has an error; the next term is 66, not 12. The series follows the pattern of differences: 3, 12, 12, 15, where differences stabilize at 15 after the second term. Thus, (48 + 18 = 66). Studying this highlights pattern recognition, providing lessons on logical reasoning for sequence problems in mathematics and data analysis.