Number series – find the next term. Sequence: 2, 4, 12, 48, 240, ( ? )
Aptitude
Odd Man Out and Series
Difficulty: Easy
Choose an option
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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:Product series frequently multiply by increasing integers. Detecting the multiplying factors allows quick prediction of the next term.
Given Data / Assumptions:
- Sequence: 2, 4, 12, 48, 240
- We need the sixth term.
Concept / Approach:Check ratios between successive terms: they may be 2, 3, 4, 5, suggesting the next ratio is 6. Such factorial-like growth is common in exam problems.
Step-by-Step Solution:
2 * 2 = 44 * 3 = 1212 * 4 = 4848 * 5 = 240Next factor is 6: 240 * 6 = 1440Verification / Alternative check:List multipliers: 2, 3, 4, 5, 6. They form a simple ascending integer sequence, confirming the logic.
Why Other Options Are Wrong:
- 960: Would imply multiplying by 4 again, breaking the increasing-factor pattern.
- 1080: Would correspond to multiplying by 4.5, not an integer step.
- 1920: Would be 240 * 8, skipping the expected factor 6.
Common Pitfalls:Assuming constant ratio. Here the ratio itself increases by 1 each step.
Final Answer:1440