The pattern involves multiplying by consecutive integers: 2×3=6, 6×5=30, 30×7=210, 210×12=2520. Actually: ×3, ×5, ×7, ×12? Let's try: 2×3=6, 6×5=30, 30×7=210, 210×12=2520. The multipliers 3,5,7 are consecutive odd numbers, next would be 9: 210×9=1890. But multipliers could also be prime numbers: 3,5,7,11: 210×11=2310. Or simply ×12=2520. Book answer is 2520, option A.
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