Fill in the next term: 2, 4, 12, 48, 240, ( … ) Follow the evolving multiplier pattern.
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A960
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B1440
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C1080
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D1920
Answer
Correct Answer: 1440
Explanation
Introduction / Context:This is a product-based series where each term is obtained by multiplying the previous term by a steadily increasing integer. Identifying the evolving multiplier lets us extend the series confidently.
Given Data / Assumptions:
- Series: 2, 4, 12, 48, 240, …
- All terms are positive integers; multipliers appear to grow.
Concept / Approach:Compute term-wise ratios to the previous term. If the ratios form 2, 3, 4, 5, … then the next multiplier is 6. Apply that to get the missing term.
Step-by-Step Solution:4 / 2 = 212 / 4 = 348 / 12 = 4240 / 48 = 5Next multiplier = 6 ⇒ Next term = 240 * 6 = 1440
Verification / Alternative check:This pattern is strictly multiplicative with consecutive integers. No additive pattern fits all jumps so precisely (2→4→12→48→240), reinforcing the identified rule.
Why Other Options Are Wrong:
- 960 / 1080 / 1920: correspond to multipliers 4, 4.5, or 8 that break the clear 2, 3, 4, 5, 6 progression.
Common Pitfalls:
- Averaging jump sizes or mixing addition with multiplication; the exact integer ratios settle the matter.
Final Answer:1440