What number comes next: 2, 4, 12, 48, 240, ___?
Correct answer: D. 1440
The multipliers increase by one each time: ×2, ×3, ×4, ×5. The next multiplier is 6, so 240 × 6 = 1,440. Dividing each term by the one before it reveals the changing multiplier.
hard